In this period there were974outbreaks of communicable disease attributed to the consumption of raw milk.
在这段时期内发生了974起由于食用生牛奶而引起的传染性疾病。
2
In this paper, the existence of infinite period bifurcation of a nonlinear communicable disease model with temporary immunity (SIRS) is studied, and we give global bifurcation of the system.