EFFICACY DROP—New Israel 🇮🇱 Health Ministry data show that 2-doses Pfizer vaccine against #DeltaVariant over the past month is now just 64% effective in preventing #COVID19 infection. In constrast in May, before #DeltaVariant prevalent, vaccine was 94%. 🧵https://t.co/OWp1M58Hmc pic.twitter.com/zWwXro2Eb8

— Eric Feigl-Ding (@DrEricDing) July 5, 2021