“Although most cases were not hospitalized, thus showing the vaccine works in an important way, this study is portentous for the achievement of herd immunity,” Andrew Noymer, an epidemiologist [and associate professor of population health and disease prevention] at the University of California, Irvine, said in an email. “If the vaccinated can become infected (and, we believe, from other studies, potentially spread covid), then herd immunity becomes more of a mirage than oasis.”
CDC study shows three-fourths of people infected in Massachusetts coronavirus outbreak were vaccinated but few required hospitalization
The Washington Post, July 30, 2021
July 30, 2021