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Whether a population will be overcome by a pandemic, with regards to the SIR model, is dependent on the value of <math>R_0</math> or the "average people infected by an infected individual."

Whether a population will be overcome by a pandemic, with regards to the SIR model, is dependent on the value of <math>R_0</math> or the "average people infected by an infected individual."

就 SIR 模型而言，被流行病感染的人口数量，取决于 <math>R_0</math> 的数值，或“被感染个体所感染的平均人数”。

就 SIR 模型而言，被流行病感染的人口数量取决于 <math>R_0</math> 的数值，或“被感染个体所感染的平均人数”。

: <math>R_0 = \beta\tau = {\beta\over\mu}</math>

: <math>R_0 = \beta\tau = {\beta\over\mu}</math>