Influenza outbreak season and distribution season

Mainly depends on temperature and humidity, which is also the reason for the high incidence of avian influenza in spring and autumn. Therefore, when you go to Fujian, Guangdong in spring and autumn, you usually wear a mask to prevent flu, pollen and the like. I found a mask that was supposed to prevent smog in JD.COM, but it was found that it could prevent a lot, so I put it in my bag for later use.