主题：聊聊新冠，乱七八糟的瞎扯 -- 普鲁托

受这些限制条件影响的是Rt或者Re

Re (effective reproduction number) which also known as Rt, is the number of people in a population who can be infected by an individual at any specific time. While measuring the transmissibility of the virus at any given time during an epidemic we use Re. It changes as the population becomes increasingly immunized, either by individual immunity following infection or vaccination and also as people die.

Factors affecting Re include the number of people with infection, the number of susceptible people with whom infected people are in contact, and people's behavior such as social distancing.