アメリカ、マサチューセッツ州でファイザーワクチンを接種済みの79人の住人がコロナに感染して集団死
Nearly 80 people have died with COVID-19 in Massachusetts even though they were fully vaccinated as the more contagious Delta variant continues to spread. These breakthrough cases where fully vaccinated individuals test positive for coronavirus have so far been rare, but are possible. Here’s what you need to know about breakthrough cases in Massachusetts: Public health officials have tracked 4,450…