These days, a mask is the most important thing that we should bring when we go outside or meet people. We wear a mask to protect ourselves from Covid-19. Also, when an infected person wears a mask, that person protects other people from himself. Do you know that there are a lot of kinds of the mask? Each mask is different from each other. The different types of the mask have different uses and different levels of effectiveness.

First of all, if we talk with an infected person who is not wearing a mask, and we also do not wear a mask. Florida Atlantic University showed a study about the driving distance of droplets. If we wear a mask and talk with other people, our droplet can spread around 2.4 m through the air. If we put on a mask and talk with an infected person who is not wearing a mask, the probability of contracting the virus is 70 percent. The probability drops to 5 percent if an infected person wearing a mask talk with other people without a mask, and the probability drops more to 1.5 percent if both people are wearing a mask. It means that a mask can save a lot of people. In reality, in early 2020, some countries did not recommend wearing a mask. As a result, a lot of people were infected with Covid-19.

▲ The rule of prevention from Covid-19

There are various types of masks in South Korea, such as KF mask, ordinary mask, dental mask, and many others. There are various kinds of KF mask. The word "KF" means the Korean filter, and the number means the blocking ratio. KF-AD mask means that the mask can block only the droplet. Other masks can block not only the droplet but also fine dust. These masks can block other substances very well. On the other hand, ordinary masks and dental masks cannot block well unlike KF masks. However, the KF mask is more expensive than an ordinary mask and dental mask.

▲ KF-94 Mask

We should wear a mask for other people and for ourselves. To protect ourselves from Covid-19, we should not only wear a mask but also wash our hands well. If we do these well, we can be safe from Covid-19. 

By Kim Yu Chan