这儿

https://abcnews.go.com/US/symptomatic-breakthrough-covid-19-infections-rare-cdc-data/story?id=79048589

With more than 156 million Americans fully vaccinated, nationwide, approximately 153,000 symptomatic breakthrough cases are estimated to have occurred as of last week, representing approximately 0.098% of those fully vaccinated, according to an unpublished internal Centers for Disease Control and Prevention document obtained by ABC News. These estimates reflect only the adult population and do not include asymptomatic breakthrough infections.

 

约为千分之一的发病率，应该反应实际情况。

上面CDC的数据太粗糙，是上报而未核实的数据。没症状的都去住院了，太扯了。为了混个免费医疗，胡绉八扯。