Johnson & Johnson vaccine 85% effective against severe COVID-19 disease Gotham Rex 3 years ago The vaccine worked better in the U.S. compared to South Africa, where it was up against a tougher, mutated virus. Source: Check out ABC 7 for more… Share: Johnson & Johnson files emergency use authorization application for COVID-19 vaccineDateFebruary 4, 2021In relation toHealth & Fitness,FDA,Coronavirus,COVID-19 vaccine,u.s. & worldFDA restricts Johnson & Johnson's COVID-19 vaccine due to rare but serious risk of blood clotsDateMay 5, 2022In relation toNew York CityFDA panel endorses booster shot for J&J COVID-19 vaccineDateOctober 15, 2021In relation toHealth & Fitness,FDA,Coronavirus,COVID-19 vaccine,u.s. & world