How does viruses control population?

People + Virus = chance of death.

Ex: 20% chance of getting a certain virus.

20% of 1,331,460,000 people (china) is 266,292,000 people.

Out of these people 35% of them will die.

35% of the infected people = 93,202,200 people will die from this virus.

Hope this answers your question.

-T.