However, the Post’s tweet did not include the caveat about how fewer needed to go to the hospital. Vaccinated people made up three-quarters of those infected in a massive Massachusetts covid-19 outbreak, pivotal CDC study finds https://t.co/nQbAIctsos Public health officials have been telling us since the beginning the vaccines aren’t perfect and that there will be breakthrough cases. We were told the Pfizer vaccine is about 94% effective, the Johnson & Johnson vaccine is about 66% effective, etc. The breakthrough cases NBC and the Post are reporting were entirely expected. Also on Friday, The New York Times tweeted that the Delta variant