Common traditional viruses

They are the two most common pathogens that cause the common cold, and it is estimated that everyone will be recruited several times a year.

2. Influenza virus and avian influenza virus

Both of them have strong variability. In particular, influenza viruses often have local epidemics or even global pandemics. In 2009, the author was thirsty by influenza A and lay at home for more than a week.

3. Measles virus

This virus is highly contagious (for example, it is far stronger than the popular COVID-19, and COVID-19's R0 is a single digit, which may not exceed 5; Measles is 12- 18), which will lead to the death of children because of complications, so a vaccine was developed; Moreover, the vaccine is really effective, and there are far fewer people suffering from measles now than before.

4. Mumps virus

It is also highly contagious, but now it is much less because of the existence of vaccines (often combined with measles vaccines).

5. Coxsackie virus, echovirus and neoenterovirus.

Can cause hand, foot and mouth disease, generally manifested as oral pain, anorexia, low fever, herpes or small ulcers in hands, feet, mouth and other parts.