This 15-month study has surprising results: it uses an old vaccine that could be the weapon against the next pandemics (and showed 92% effectiveness against covid)
A vaccine from the past to the future? Experts are optimistic. But even so, they also call for caution. In any case: “If we had known about this at the beginning of the covid-19 pandemic, we would have managed to obtain a great protective effect on the population during the first year of the pandemic” …