Can we wear a N95 mask with valve?

If you ask if you can wear this mask again, I think the scientific answer is to distinguish its uses. In other words, if you have been quarantined for half a month, have not been out during the Chinese New Year during this period, and have not been in contact with people from Wuhan or people who have been ill, then your main purpose of wearing a mask is to protect you from being infected. In other words, the purpose of wearing a mask is to prevent viruses in the air from inhaling your respiratory tract, so wearing this kind of mask with a valve is relatively comfortable and safe.

However, if you are a patient or a suspected patient, if you wear this mask, the air you exhale does not pass through the three-layer structure of the mask, but directly enters the air through the valve, then the surrounding air may be If there is a virus, it will spread infection to others, so don’t wear such a mask.

In short, for most healthy people, it is safe to wear a mask with a valve, because the way of transmission of the virus is droplet transmission and contact transmission. For patients, it is best not to wear this mask.