更常見的是，我關(guān)注了每天的新增感染人數(shù)I(t)和康復人數(shù)R(t);而且在信息被推送時，我注意到了以上兩種人數(shù)的曲線總是呈現(xiàn)種特定的模式。我期盼疫情能得以被控制住，直至結(jié)束。我想弄清楚究竟是什么樣的傳播機制。比如：感染人數(shù)I(t),易感染人數(shù)S(t), 康復人數(shù)R(t)的變化是否存在某種相關(guān)性？

是的，我Google了，就是用一組微分方程組描述的SIR大疫情模型。

英文：

More commonly, I have followed the daily numbers of new infections I(t) and recoveries R(t); and from the daily updates, I have noticed that the curves of these two numbers always show a particular pattern. I hope that the epidemic will be contained until it is over. I wanted to find out what the mechanism of transmission was. For example, is there a correlation between the number of infected I(t), the number of susceptible S(t) and the number of recovered R(t)?

Yes, I Googled it, it's the SIR pandemic model des-cribed by a set of differential equations.