Pfizer vaccine has 91% efficacy for up to six months, trial shows | Coronavirus | The Guardian

The findings are the first to demonstrate that the vaccine remains effective for many months, an outcome that doctors and scientists had desperately hoped for because it suggests that people being vaccinated now should be protected at least until the autumn when boosters may be ready. Source: Pfizer vaccine has 91% efficacy for up to six months, trial shows | Coronavirus | The Guardian