Parameter values used in the model.
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‘Default values’ are used in Fig 3, while parameter ‘ranges’ are used in Figs 4 and 5. Notes: a) For comparability between the two types of vaccines, we choose ϵ = c. b) R0 is given by the ratio β/γ in the model: their individual values do not independently affect epidemic sizes, so it is only necessary to choose R0. c) Value corresponds to a mean lifetime of 70 years. d) Under the baseline values shown here, k is tuned to give seasonal epidemics infecting roughly 10% of the population. e) In the absence of a natural scale for k, we simply take half and twice the baseline value.
图3采用默认参数值(default values),图4与图5则采用参数取值范围(parameter ranges)。 注: a) 为确保两类疫苗的可比性,我们设定ϵ = c。 b) 模型中基本再生数(R0)由比值β/γ计算得到;β与γ的单独取值不会独立影响疫情规模,因此仅需确定R0即可。 c) 该参数取值对应70年的平均预期寿命。 d) 基于此处给出的基准参数值,我们对参数k进行调优,使季节性疫情的感染人群约占总人口的10%。 e) 由于参数k不存在天然的取值尺度,我们仅取基准值的二分之一与二倍作为其取值范围。



