Sensitivity analysis of the first vaccination where 0, 2, 4, 6, 8, 10 percent of the city population develops natural immunity.

Sensitivity analysis of the first vaccination where 0, 2, 4, 6, 8, 10 percent of the city population develops natural immunity.针对首次疫苗接种的敏感性分析，该分析设定城市人口分别有0%、2%、4%、6%、8%、10%获得自然免疫。