1, medical surgical mask.
2. masks such as N95, KN95, DS2 and FFP2.
2. General medical masks can't prevent infection. The mask that can effectively prevent infection is a medical surgical mask. Some friends may be confused about these two masks. The implementation standards of common medical masks and medical surgical masks are different. Without the "medical surgical mask" logo, the infection prevention is relatively poor, as shown in the following figure.
3. When purchasing a mask, you can confirm whether the words YY0469-20 1 1 are on the mask package, that is, whether it meets the standards of medical surgical masks. The words YY0469-20 1 are on the outer packaging of medical surgical masks, as shown in the figure.
4. Distinguish the authenticity of the mask, and it can also be distinguished by the appearance of the mask. For example, 3M masks can be distinguished by looking at the logo. Real 3M masks have thick fonts and small font spacing. As shown in the figure, the left mask is a fake mask and the right mask is a real mask.
5, the smell of the mask, the real 3M mask has no smell, and the fake 3M mask may have some pungent smells, such as the smell of disinfectant and rubber.
6. So when we buy masks, we must go to a regular pharmacy to buy them. Don't buy it at street stalls just because it's cheap, so as not to buy fake masks and expose your danger.
7. Finally, it is obvious that masks can prevent viruses to some extent, but not completely. Wash your hands frequently, maintain personal hygiene and pay attention to indoor ventilation. Strengthen exercise, keep fit and improve immunity.