Can three layers of masks prevent epidemics?

The new coronavirus is menacing, and we should pay attention to the following 5 points regarding coronavirus prevention:

Practice hand hygiene. Wash your hands with running water or use an alcohol-based hand sanitizer after coughing, before eating, after using the toilet, or after touching or handling animal waste.

Maintain good indoor air circulation. Avoid going to closed, poorly ventilated public places and crowded places, and wear a mask if necessary. Cover your mouth and nose with a tissue or bend your elbow when coughing and sneezing to prevent droplet transmission.

When visiting the hospital or accompanying a nurse, be sure to wear a well-fitting mask.

Good and safe eating habits,Separate cutting boards and knives for raw and cooked foods, and cook meat and eggs thoroughly.

Try to avoid unprotected contact with wild or farmed animals.

In addition, wearing a mask is currently one of the core prevention methods, and healthy people should wear N95 masks to prevent themselves from being infected. However, for everyone who uses a certain type of protective mask for the first time, a fit test should be carried out to determine whether the mask is suitable for their face shape, and avoid wearing a mask that does not fit properly, otherwise the protective mask will not provide effective protection (after wearing the mask, exhale forcefully, and the air cannot leak out of the edge of the mask). Precautions for wearing a mask:

In order to better play the protective role of the mask, try to tighten the elastic band of the mask when wearing the mask, and press the aluminum sheets on both sides of the nose to reduce leakage around it, and it is best to breathe slowly.

Wear it at the right time. The medical non-woven mask can be used for 6-8 hours, and should be replaced in time in case of the following conditions: difficulty breathing, the mask is damaged or destroyed; The mask does not fit snugly to the face, the mask is contaminated (e.g., if it is stained with foreign objects such as blood stains or droplets), has been used in isolation wards, or has been exposed to patients, and has an odor.

Do not squeeze the mask with your hands after wearing it. All kinds of masks, including N95 masks, can only isolate the virus on the surface of the mask, and if you squeeze the mask with your hands, so that the virus will soak the mask with droplets, you still have a chance to infect the virus.

Do not discard discarded masks at will, otherwise they will cause secondary pollution. Masks used in general environments should be put in garbage bins, and used masks that pollute the environment should be treated harmlessly as hazardous waste.

Prevention knowledge] Actively protect and protect yourself.

Inventory of commonly used types of masks.

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Can three layers of masks prevent epidemics? No, the cloth mask is three-layered, and he is not diligent, so there is a full-time mask to prevent the epidemic.

Masks can be bought or not sterilized-grade. Both non-sterilized and sterilized masks have protective functions that can block droplets and prevent cross-infection, all of which meet the standards of "Disposable Medical Masks". Masks prevent or reduce the entry of airborne dust into the respiratory organs.

A mask is generally worn on the mouth and nose to filter the air entering the mouth and nose, and is made of materials such as gauze or paper, which is a kind of hygiene product.

Masks are divided into: cotton masks, non-woven masks, polymer material masks, activated carbon powder filter masks, and activated carbon fiber felt cushion masks.

Under normal circumstances, disposable medical masks and surgical masks are limited to one use, and the cumulative use should not exceed 8 hours.

1. What is an N95 mask?

The N95 mask is one of nine particulate respirators certified by NIOSH (National Institute for Occupational Safety and Health). "N" stands for not resistant to oil"95" means that the particle concentration inside the mask is more than 95% lower than the particle concentration outside the mask when exposed to a specified number of special test particles.

The protection level of N95 means that the filter material of the mask has a filtration efficiency of 95% for non-oily particles (such as dust, acid mist, paint mist, microorganisms, etc.) under the testing conditions specified in the NIOSH standard. Similarly, the N90 mask has a filtration efficiency of 90%.

N95 type mask use range:

Protection of medical personnel and related staff against airborne respiratory infections.

Basic protection for medical personnel or related personnel, as well as protection against the spread of blood, body fluids, and splashes during invasive procedures.

Disposable hygiene care in an ordinary environment, or the barrier or protection of particles other than pathogenic microorganisms such as pollen.

2. What is a KN95 mask?

KN95 is the classification of anti-particulate masks in the Chinese national standard GB2626-2006, which refers to masks with a filtration efficiency of more than 95% for non-oily particles above microns.

Scope of use of KN90 mask:

It is mainly suitable for non-ferrous metal processing, metallurgy, steel, coking, gas, organic chemicals, food processing, construction, decoration, petrochemical and asphalt to produce dust, smoke, fog and other oily and non-oily particulate matter pollutants in the industry.

Therefore, the technical requirements and test methods of the two levels of KN95 masks and N95 masks are basically the same, but they belong to the standards of different countries.

3. What is a surgical mask?

The outermost layer is a non-woven fabric that is used to keep out dust.

The middle layer is called the dissolution spray material, which is treated with 100,000 volts of high voltage electricity to form very fine velvet filaments, which are used to produce electrostatic adsorption particles.

The innermost layer is skin-friendly non-woven fabric, which is more friendly and not easy to allergies.

Surgical masks are masks worn by healthcare workers at work. It is mainly used in medical outpatient clinics, laboratories, operating rooms and other high-demand medical environments, with a relatively high safety factor and strong resistance to bacteria and viruses. Surgical masks can also be used to prevent the spread of influenza and respiratory diseases.

To sum up, the comparison:

If you are in an epidemic area, then to use a medical-grade N95 mask, in addition to isolating droplets, you need to have a certain antibacterial effect.

If you are not in an endemic area, then you don't have to use medical-grade masks, such as industrial masks above N90.

From the perspective of protection capacity: N95 masks, KN95 masks, > N90 masks, medical surgical masks, > ordinary masks.

In terms of wearing comfort: ordinary masks, medical surgical masks, > kn95 masks, n95 masks.

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When it comes to what kind of mask to buy during the pandemic, this question is closely related to where you work and where you travel. For example, if you work in an ordinary factory, then wear a disposable ordinary mask, if you go to the hospital to contact high-risk groups, then wear an N95 mask, if you go to a station, dock, then wear a disposable medical mask, if you are at home, as long as you are ventilated, then do not wear a mask. With that said, you'll know which mask to buy.

1. When choosing a mask for an outbreak, you should choose a surgical mask of the appropriate size, and children can choose a children's size, so that the surgical mask fits snugly to the face.

2. For some close contacts and medical staff, N95 masks need to be worn to play a protective role.

3. You should pay attention to washing your hands before wearing a surgical mask, and avoid touching the mask after wearing a surgical mask, and if you must touch the mask, wash your hands thoroughly before and after touching. When removing the mask, try to avoid touching the outward part of the mask, because these parts have been contaminated with germs, and the mask should be changed in a timely manner. In general, surgical masks cannot be reused.

In addition, if the mask is damaged or soiled, it should be replaced immediately.

During the epidemic, which of these three common medical masks has the best protective effect? Tell your family after reading it.

Just buy a surgical mask. Change your mask frequently.

A general mask is fine, and it is good to change it often every day.