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SureSeal ASTM Level 3 Black Surgical Face Masks
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3M 9502V+ KN95 Medical Particulate Respirator Mask
3M 9542V+ KN95 Medical Particulate Respirator Mask
3M 9502+ KN95 Medical Particulate Respirator Mask
3M 8210V N95 Niosh Approved Particulate Respirator
3M 8210 N95 Niosh Approved Particulate Respirator
3M 8511 N95 Niosh Approved Particulate Respirator
3M 1860 N95 Niosh Approved Particulate Respirators
Marcio KN95 Medical Particulate Respirator Mask
HoneyWell H901 KN95 Medical Particulate Respirator
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Moldex 2200N95 Series Particulate Respirator
Moldex 2600N95 Series Particulate Respirator
Moldex 2600N95 Series TC-84A-0013 Respirator
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Disposable Surgical Medical Face Masks and N95 Respirators


As there is a world wide shortage of Disposable Surgical Medical Face Masks Because of the CoronaVirus. These are Special Order and there are no returns. The sale of this item is subject to regulation by the U.S. FDA and therefore is Non Returnable. Once the Order is Placed we can not Cancel the Order as it goes to the Warehouse that ships the product out as fast as possible to Help those in Need.


Dont forget to buy your Hospital level Disinfectant Here

We have all these Face Masks in Stock and Ready to ship. 1 to 5 Days Delivery Time


Personal Protective Equipment Disposable Dental Face Masks



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Face Mask Levels

Our inventory of products are rated on the American Society for Testing and Materials (ASTM). The three levels consist of:

ASTM Level 1 – Low fluid resistance
ASTM Level 2 – Moderate fluid resistance
ASTM Level 3 – High fluid resistance

When choosing your specific face mask, make sure you choose the appropriate level in which procedures you will be preforming. Our masks include ear loop masks, procedure masks, respirators, surgical masks and face shield masks.

Purchase Face Masks

For any questions regarding face masks or personal protective equipment products on the Lions Dental Supply website, fill out our request for info page and someone will be in touch with you shortly.

Shop Lions Dental and stock up on all of the appropriate facemasks your procedures require.

Lions Dental- Medical Face Masks
Lions Dental is your number one source for medical face masks and surgical face masks. It is our goal to provide you and your staff with the highest quality of personal protection products and service solutions. Our infection prevention and solutions page is a great resource center to learn more about the safety and health precautions your practice should be taking.

We carry a large variety of face mask products. These should be worn both by healthcare workers and patients when necessary. When wearing our products properly, they will guard against large splashes, droplets or sprays from entering the nasal and oral regions.

Licensed Medical Professionals turn to Lions Dental/Medical Supply as their source for medical face masks and surgical face masks.

Lions Medical is a leading distributor to health care providers

Wearing a surgical Face mask may help prevent influenza, according to some studies, as the virus spreads through droplets in the air when an infected person coughs, sneezes or talks. A mask could protect you from inhaling these droplets if it were worn consistently and fully covered the mouth and nose. the CDC recommends covering your mouth with a Disposable Face mask or face cover.


The coronavirus, while not the flu, does cause flu-like symptoms in those who have contracted it. Health officials believe the virus was initially transmitted from animals to humans, but that human-to-human transmission of the illness is now occurring.

The U.S. Centers for Disease Control and Prevention only recommends Disposable Surgical face masks or Face covers for everyone now

Dr. Frank Esper, a pediatric infectious disease specialist at the Cleveland Clinic, said some really sick people should wear a Face mask.

 
"If they are coughing, if they are feeling like they have symptoms, we do ask them to put on Disposable face mask when they are coming to our waiting room or ER or into a public space," he said. "It helps prevent the spread of infection."

Health officials are concerned the rapid spread of the virus could mimic the outbreak of the SARS virus in the early 2000's, during which many people also wore Disposable Face masks for protection.

Following the SARS outbreak, which also originated in China, researchers in Australia tested data that suggested transmission of the viral respiratory infection was significantly reduced with the use of Disposable face masks as well as other infection control measures.


The study, published in the International Journal of Infectious Diseases in 2008, found that Disposable Face masks were 80% effective in protecting against clinical influenza-like illness when worn consistently. There wasn't much difference between the two types of Face masks tested — P2 face masks and Disposable surgical Face masks — according to the study. So taking steps to clean everything you touch with Disinfectant and wearing Disposable Surgical Face masks will help prevent the spread of any virus.

Right now in the USA and in China . there is a run on Disposable Triple Layer Face masks. People and Hospitals are buying up all the face masks they can get. China who makes the Disposable face masks are already running out of face masks. they are trying to source stock from around the world to send back to China and meet demand.

Our Disposable Medical Face Masks are 3 Layer construction: made of non-woven fiber fabric with 3 layer, soft and breathable, provides a effective protect; They are hypoallergenic, non-toxic and suitable for sensitive skin with zero chemical smell for your comfort and enjoyment.

High weaving professional surgical Medical mask is suitable for hospital care, allergy mask, sanitary masks, pollen mask, hospital masks, procedure mask, dental clinic, home cleaning, sanitary masks, surgical, flu, dentists etc.

Filtering facepiece respirators (FFR), which are sometimes called disposable respirators, are subject to various regulatory
standards around the world. These standards specify certain required physical properties and performance characteristics in
order for respirators to claim compliance with the particular standard. During pandemic or emergency situations, health
authorities often reference these standards when making respirator recommendations, stating, for example, that certain
populations should use an “N95 masks, FFP2 masks, or equivalent” face masks respirator.

• N95 masks (United States NIOSH-42CFR84)
• FFP2 Masks (Europe EN 149-2001)
• KN95 Masks (China GB2626-2006)
• P2 Masks (Australia/New Zealand AS/NZA 1716:2012)
• Korea 1st class (Korea KMOEL - 2017-64)
• DS (Japan JMHLW-Notification 214, 2018)
As shown in the following summary table, Face Mask respirators certified as meeting these standards can be expected to function very
similarly to one another, based on the performance requirements stated in the standards and confirmed during conformity
testing.
One notable comparison point is the flow rates specified by these standards for the inhalation and exhalation resistance
tests. Inhalation resistance testing flow rates range from 40 to 160L/min. Exhalation resistance testing flow rates range from
30 to 95 L/min. Some countries require testing to be performed at multiple flow rates, others at only the high or low end of
those ranges. Although this appears to suggest that the standards’ requirements for breathing resistance (also called “pressure
drop”) differ from each other, it’s important to understand that pressure drop across any filter will naturally be higher at
higher flow rates and lower at lower flow rates. Given typical pressure curves for respirator filters, the standards’ various
pressure drop requirements are actually quite similar.

Definitions
Filter performance – the filter is evaluated to measure the reduction in concentrations of specific aerosols in air that passes
through the filter.
Test agent - the aerosol that is generated during the filter performance test.
Total inward leakage (TIL) – the amount of a specific aerosol that enters the tested respirator facepiece via both filter
penetration and faceseal leakage, while a wearer performs a series of exercises in a test chamber.
Inward leakage (IL)– the amount of a specific aerosol that enters the tested respirator facepiece, while a wearer performs a
normal breathing for 3 minutes in a test chamber. The test aerosol size (count median diameter) is about 0.5 micro meter.
Pressure drop – the resistance air is subjected to as it moves through a medium, such as a Face Mask respirator filter.


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Frequently Asked Questions


What is the purpose of a Medical Face Mask?

In the Operating Room (OR), surgical masks protect the sterile field from possible contamination, primarily as a result of coughing, sneezing or talking. A mask may also protect clinicians from the byproducts of surgical procedures such as bone chips, splashes of body fluids, and smoke plume resulting from laser or electrosurgical techniques.

What is the difference between a surgical mask and a procedure mask?

A surgical mask is used inside the operating room or during other sterile procedure areas to protect the patient environment from contamination. Surgical masks have ties so that they can be adjusted for fit, and are tied over the top of a surgical or bouffant cap.

A procedure mask is used for performing patient procedures, or when patients are in isolation to protect them from potential contaminants. They are used for 'respiratory etiquette' to prevent people from spreading germs via talking, coughing, or sneezing. Procedure masks have ear loops for quick donning, and since they do not slide on the hair can be worn without a surgical cap.

How long is my face mask effective?

A mask should be worn for only one patient procedure or visit. If a mask gets wet or soiled it should be replaced.

Why is the fit of a mask important?

A mask is only as effective as its fit. There should be no gaps along the side, around the nose or under the chin that would allow air and droplets to bypass the filter medium. A well-fitting mask stays in place over the nose and cheeks and even a regular mask will prevent fogging of eyeglasses if it fits properly. Masks should not be worn underneath the nose or dangling around the neck — they should either be fully on, or disposed of.

How do I ensure a good fit?

The most important consideration is the nose piece. It should mold over the nose and cheeks and maintain its shape over time. It should not kink or break when adjusted. The upper tie should sit at the crown of the head, and the lower tie should be tied behind the neck to hold the sides of the mask against the face to prevent any gaping.

What is the difference between a medical mask and a respirator?

Medical masks (surgical/procedure masks) are loose fitting masks that cover the mouth and nose. A respirator is designed to reduce exposure to airborne contaminants. Known airborne pathogens include TB, SARS, Anthrax, and Hanta virus. Respirators must be individually selected to fit the wearers face and shown to provide a good seal. They also must be certified by NIOSH, and used within a comprehensive respiratory program including fit testing and training.


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Surgical Face Masks (Face Masks)
A surgical mask is a loose-fitting, disposable device that creates a physical barrier between the mouth and nose of the wearer and potential contaminants in the immediate environment. Surgical masks are regulated under 21 CFR 878.4040. Surgical masks are not to be shared and may be labeled as surgical, isolation, dental, or medical procedure masks. They may come with or without a face shield. These are often referred to as face masks, although not all face masks are regulated as surgical masks.

Surgical masks are made in different thicknesses and with different ability to protect you from contact with liquids. These properties may also affect how easily you can breathe through the face mask and how well the surgical mask protects you.

If worn properly, a surgical mask is meant to help block large-particle droplets, splashes, sprays, or splatter that may contain germs (viruses and bacteria), keeping it from reaching your mouth and nose. Surgical masks may also help reduce exposure of your saliva and respiratory secretions to others.

While a surgical mask may be effective in blocking splashes and large-particle droplets, a face mask, by design, does not filter or block very small particles in the air that may be transmitted by coughs, sneezes, or certain medical procedures. Surgical masks also do not provide complete protection from germs and other contaminants because of the loose fit between the surface of the face mask and your face.

Surgical masks are not intended to be used more than once. If your mask is damaged or soiled, or if breathing through the mask becomes difficult, you should remove the face mask, discard it safely, and replace it with a new one. To safely discard your mask, place it in a plastic bag and put it in the trash. Wash your hands after handling the used mask.


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N95 Respirators
An N95 respirator is a respiratory protective device designed to achieve a very close facial fit and very efficient filtration of airborne particles.

The 'N95' designation means that when subjected to careful testing, the respirator blocks at least 95 percent of very small (0.3 micron) test particles. If properly fitted, the filtration capabilities of N95 respirators exceed those of face masks. However, even a properly fitted N95 respirator does not completely eliminate the risk of illness or death.

Comparing Surgical Masks and Surgical N95 Respirators
The FDA regulates surgical masks and surgical N95 respirators differently based on their intended use.

A surgical mask is a loose-fitting, disposable device that creates a physical barrier between the mouth and nose of the wearer and potential contaminants in the immediate environment. These are often referred to as face masks, although not all face masks are regulated as surgical masks. Note that the edges of the mask are not designed to form a seal around the nose and mouth.

An N95 respirator is a respiratory protective device designed to achieve a very close facial fit and very efficient filtration of airborne particles. Note that the edges of the respirator are designed to form a seal around the nose and mouth. Surgical N95 Respirators are commonly used in healthcare settings and are a subset of N95 Filtering Facepiece Respirators (FFRs), often referred to as N95s.

The similarities among surgical masks and surgical N95s are:

They are tested for fluid resistance, filtration efficiency (particulate filtration efficiency and bacterial filtration efficiency), flammability and biocompatibility.
They should not be shared or reused.

General N95 Respirator Precautions
People with chronic respiratory, cardiac, or other medical conditions that make breathing difficult should check with their health care provider before using an N95 respirator because the N95 respirator can make it more difficult for the wearer to breathe. Some models have exhalation valves that can make breathing out easier and help reduce heat build-up. Note that N95 respirators with exhalation valves should not be used when sterile conditions are needed.

All FDA-cleared N95 respirators are labeled as "single-use," disposable devices. If your respirator is damaged or soiled, or if breathing becomes difficult, you should remove the respirator, discard it properly, and replace it with a new one. To safely discard your N95 respirator, place it in a plastic bag and put it in the trash. Wash your hands after handling the used respirator.

N95 respirators are not designed for children or people with facial hair. Because a proper fit cannot be achieved on children and people with facial hair, the N95 respirator may not provide full protection.


ASTM Mask Levels: What Should Dental Hygienists Wear?


There are a ton of different types of masks on the market. Dental masks vary in level, color and patterns, fit, comfort, and price. However, are we buying and using the correct mask for the procedures we are performing daily? As dental professionals, mask level is not something that is always thought about routinely. Some may not even realize the level indicator on the box even means something. This article will break down each level and show us what we need to stay protected while doing the job we love.

The level is one of the most important aspects of a mask. The American Society for Testing and Materials (ASTM) have defined mask levels and when dental professionals should be using which level mask throughout different procedures. Even though the higher level mask usually equals a higher price, we need to protect ourselves. Aerosols, and how to reduce them, continue to be a big topic. We need to know how to protect ourselves with proper protective equipment, but also reduce aerosols utilizing the high-volume evacuation when necessary.

Masks are broken down into three levels; 1, 2 and 3. Level 1 is considered low barrier. The procedures included in wearing a level 1 mask safely consist of exams, operatory cleaning, taking impressions, laboratory work, and orthodontics. That’s it! That does not include a prophylaxis or non-surgical periodontal therapy.2

Level 2 masks are considered moderate barrier. Moderate barrier considers aerosols and splatter to be moderately generated. Procedures include prophylaxis, non-surgical periodontal therapy, endodontics, sealants, restorative, and limited oral surgery. So now we know where our procedures stand as dental hygienists. But keep reading, because it is about to go one step further regarding what we are using to perform these procedures. 2

Level 3 masks are considered high barrier. This includes procedures where heavy amounts of fluid, splatter, and aerosols are produced. Procedures include the use of an ultrasonic scaler, use of an air polisher, crown preparation, implant placement, periodontal surgery, and complex oral surgery. 2

As dental hygienists, we are, or certainly should be, using an ultrasonic scaler on our patients. The benefits speak for themselves from an oral health perspective, as well as ergonomics for the clinician. Therefore, if you are using an ultrasonic or air polisher, a level 3 mask should be worn!

Now that the masks levels have been explained, it is the decision of the dental professional to choose if they want to purchase multiple levels for the office or stick to the highest level, so the provider is always covered. It may suit an office to work in a level 3 mask during ultrasonic instrumentation and discard it after the procedure. When returning to the operatory to disinfect, the dental professional can put on a level 1 mask for protection.

To dive a little deeper into mask safety, it is important to change the mask after every patient. In addition, masks should be changed if working in an environment of high aerosols production every 20 minutes. Lastly, the way the mask is worn is also extremely important. There is a front and back to a mask. One side should go toward your eyes, the other toward your chin. The mask should be pulled fully over the nose, mouth, and chin to be fully protected. 2 Simply put, wear the mask correctly to protect yourself.

Dental hygienists, dentists, and dental assistants fall into the top 5 jobs that are most damaging to our health.1 By wearing proper protective equipment such as masks, glasses, gown, and gloves, we can help ourselves stay healthy!

From Today's RDH


Riverside County is on the edge of closing businesses next week as COVID-19 metrics worsen


Riverside County faces the possibility of closing businesses again next week as its coronavirus metrics continue to worsen and inch back toward the purple tier, the most strict tier of the state's reopening plan. 

"There is no good way to say it, but both our positivity rate and case rate are still rising," Riverside County Public Health Officer Cameron Kaiser said during Tuesday's Board of Supervisors meeting. "We see a similar phenomenon in San Bernardino County, so we do not believe this is a local artifact of our own numbers."

The state on Tuesday followed through on its promise to return counties to more strict tiers if their metrics faltered, as California Health and Human Services Secretary Mark Ghaly announced that Tehama County would move back to the purple tier this week and Shasta County would return to the red tier.

“We spent a lot of time looking at data and making sure trends are correct and thoughtfully proposed the move back,” Ghaly said.

The looming threat of a walk-back for Riverside County elicited dismay from some county supervisors, including First District Supervisor Kevin Jeffries.

“Who is going to go back and tell those businesses that reopened they have to close, because it ain’t going to be me,” Jeffries said. “This time next week, possibly, we could be in purple and everyone that opened has to close again? Wow, ok.”

In determining whether a county can move to the next phase, the state looks at two metrics: positivity rate and case rate. Counties must show consistent metrics for two weeks before moving tiers, and must remain in each tier for at least three weeks.

The state does not start marking time until both rates fall within a tier's required metrics.

Riverside County's positivity rate of 5% falls in the red tier, where the county currently sits, said Riverside County Public Health Director Dr. Kim Saruwatari. That's up from last week's 4.7%, which fell into the orange tier and gave residents hope that the county could move forward and businesses could increase occupancy soon.

However, the county's case rate has hit 6.8 positive coronavirus cases per 100,000 people, which the state adjusted up to 7.6 based on the county's lag in testing. Under its new system, the state health department adjusts counties' case rates based on whether they're conducting more than or fewer than the state's average number of tests.

This case rate is trending back toward the metrics of the purple tier. It's an increase from last week, when the county confirmed six new coronavirus cases per 100,000 residents, which the state adjusted up to 6.6.

"While we expect to remain in the red tier this week, the adjusted case rate is currently entering the purple tier again," Kaiser said. "If the trend continues, we are informed by the state we face the possibility of going backward."

Here's where Riverside County would need to fall to move between tiers in the coming weeks:

The purple tier allows for outdoor dining and other outdoor gatherings. To move back to the purple tier, the county's case rate would need to increase to more than seven new COVID-19 cases per 100,000 residents on a rolling seven-day average, and it would need to report a positivity testing rate higher than 8% — both for two full weeks.
The red tier allows movie theaters, museums, zoos, aquariums, churches, fitness centers and indoor dining restaurants to open at partial capacity. To stay in the red tier, the county would need to document between four and seven new COVID-19 cases per 100,000 residents on a rolling seven-day average, and report a positivity testing rate between 5% to 8% for two weeks.
The orange tier allows for increased business capacity. To move to the orange tier, the county would need to document fewer than four new COVID-19 cases per 100,000 residents on a rolling seven-day average, and report a positivity testing rate between 2% to 4.9% for two weeks.

The county reported testing 158.6 people per 100,000 residents, something that Kaiser hopes to push upward in order to bring the county's other metrics down and be able to identify new cases before they lead to an outbreak.

Kaiser stressed that residents need to work with contact tracers to help mitigate further spread.

"We don't judge," Kaiser said of the county's contact tracers. "We just want this to end."

Additionally, the county offered details about the state's new health equity metric applied to COVID-19 metrics for the first time this week. Public health officials are now breaking down each county into quartiles to further examine positivity rates in the most disadvantaged zip codes. The equity measure will require that positive test rates in counties' most disadvantaged neighborhoods, where rates are often much higher, do not significantly lag behind the county overall.

For counties with a population greater than 106,000 that are working toward entering the orange tier, their fourth-quartile communities must be within 5% of the orange tier threshold, or less than or equal to 5.2%.

For counties to stay in the red tier, that number must be less than or equal to 8%.

In Riverside County's fourth quartile, the positivity rate hit 7%. 

While communities living in disadvantaged parts of the county are seeing a higher positivity rate, Saruwatari said the increase in numbers is being observed everywhere.

"We are not seeing any definitive increases by age, race or area," Saruwatari said. "It appears to be relatively countywide. The concern is people are starting to become more laxed in terms of social distancing, mask-wearing and hand-washing."

Saruwatari said Labor Day could be a slight contributor to the numbers, but really the increase is more likely due to businesses reopening, and individuals forgetting to social distance and wear masks properly.

Neighboring San Bernardino County will not move out of the purple tier any time soon. The county reported a positivity rate of 6.4% on Tuesday, up from 5.7% last week. It also reported 9.2 cases per 100,000 people, adjust to 9.6. Those numbers are up from 7.2 and 7.7., respectively, from last week.

As of Tuesday, there are now 16 counties in the purple tier, 24 in the red tier, 11 in the orange tier and seven in the yellow tier. Overall, the state reported 7.1 new coronavirus cases per day per 100,000 residents, and a 3.2% seven-day average positivity rate. 


US Coronavirus: Half of US states are reporting increased Covid-19 cases and some leaders push new measures

Half of US states are reporting an uptick in new Covid-19 cases and some state leaders have sprung into action to help curb the spread of the virus.

Wisconsin issued an emergency order Tuesday limiting public gatherings to no more than 25% of a room or building's total occupancy, the governor's office said.


"We're in a crisis right now and need to immediately change our behavior to save lives," Gov. Tony Evers said in a statement.

Evers' response follows grave milestones for his state: Wisconsin reported its highest daily cases, highest death toll and record-high hospitalizations in the past days.

Meanwhile in Kentucky, which Gov. Andy Beshear says is seeing the third major escalation of Covid-19 cases, authorities were instructed to step up mask enforcement.

"I have seen some things floating around about how we can't enforce this because it's an executive order," the governor said. "They have the force of law [under] Kentucky statute."

In New York, officials have reported several clusters of Covid-19 cases and the governor laid out a new plan this week on how the affected communities will move forward.

 

Areas where clusters are occurring will have to close schools and essential businesses except for takeout dining, limit gatherings at houses of worship to 25% with a maximum of 10 people and prohibit mass gatherings, the governor said.

The announcements are the first sign of tightening restrictions across the country as the US approaches a season experts have warned will be challenging -- and deadly.

 

25 states report rise in cases
Kentucky and New York are among the 25 states reporting more new cases than the previous week.

Alaska and Montana reported record-high daily case counts this week. In Ohio, the governor said new cases are "trending upward."

Fourteen states reported more than 1,000 new cases Tuesday. California, Florida, Kansas, Texas and Wisconsin had more than 2,000 infections.

Only three states -- Hawaii, Iowa and South Carolina -- report a decline in cases over the past week.

"Instead of going into the fall and the winter on a sharp decline down to a low baseline, we're actually going into the fall and the winter with some parts of the country ticking up, which will ultimately lead to not only more infections, but more hospitalizations and then community spread, which will ultimately lead to morbidity and mortality," Dr. Anthony Fauci told students at American University this week.

Experts have warned the rise in cases will be followed by an uptick in hospitalizations and deaths. Researchers with the University of Washington's Institute for Health Metrics and Evaluation project the US could see more than 2,900 deaths each day by January. And in total, more than 360,000 Americans could be killed by the virus by the new year.

So far, more than 7.5 million infections have been reported -- more than any other country. More than 211,000 Americans have died, according to Johns Hopkins University.

 

Neurological symptoms in hospitalized patients
Meanwhile, as health officials track the spread of the virus, many continue to research its effects on the body.

A new study suggests neurological symptoms occur in most hospitalized Covid-19 patients.

The study "highlights the high frequency and range of neurologic manifestations, which occurred in more than four fifths of Covid?19 patients hospitalized in our hospital network system," the researchers wrote in the study, published in the journal Annals of Clinical and Translational Neurology.

The researchers, from Northwestern University Feinberg School of Medicine, found that at any time during the course of their Covid-19 illness, 82% of the patients who were studied had neurological symptoms such as headaches or encephalopathy, altered brain function or structure.

Researchers found patients with any neurological symptoms tended to be younger than those without.

"The fact that any neurologic manifestations as a whole were more likely to occur in younger people is surprising, and could potentially be explained by greater clinical emphasis on the risk of respiratory failure than other symptoms in older patients," the researchers wrote. "In contrast, encephalopathy was more frequent in older patients."

 

Updated guidelines for vaccines
The US Food and Drug Administration issued guidance Tuesday for companies hoping to get emergency use authorization (EUA) for a Covid-19 vaccine.

The FDA said companies will have to include at least two months of follow-up after volunteers get their second dose of the vaccine. That would mean no company could seek an EUA before mid-November, because the vaccines furthest along in clinical trials -- those made by Pfizer and Moderna -- both require waiting either 21 or 28 days between doses.

"Being open and clear about the circumstances under which the issuance of an emergency use authorization for a COVID-19 vaccine would be appropriate is critical to building public confidence and ensuring the use of COVID-19 vaccines once available," said Dr. Peter Marks, who directs the FDA's Center for Biologics Evaluation and Research.

The guidance comes weeks after a poll found the majority of Americans believed political pressure would cause the FDA to rush a Covid-19 vaccine. But health officials have forcefully pushed back saying science will be what leads the way.

Fauci said earlier this week it's likely US health officials will know whether a vaccine is safe and effective as early as next month.

"I think comfortably around November or December, we'll know whether or not the vaccine is safe and effective," he said.