在一些县的疫苗接种率较高的县中发现了更高的Covid率 - 为什么，以及它对Δ变体的说法

一个新的分析发现了几个患有高度平均疫苗接种率的母亲也有更高的Covid案例率，而案例率占据了疫苗接种率以下的县，这五个县：Modoc，Glenn，Lassen，Del Norte和San Benito, which have below-average vaccination rates and decreasing case rates.He notes, first, the counties referenced with higher vaccination and case rates are more densely populated.“If there are a lot of people around you’re more likely to bump into one who has COVID,” Norris explained.Norris notes that as case rates increase with the Delta variant, more vaccinated and unvaccinated people will get COVID, though data indicates that the rates will likely remain much higher among the unvaccinated.