Covid-19: is collective immunity achievable?
2021-07-27T13:06:22.000+02:00 — With this in mind, scientists have therefore revised upwards the thresholds to be reached since the start of the health crisis. According to Alain Fischer, a physician immunologist also nicknamed the government’s Mister vaccine, to achieve collective immunity, no less than 90% of the population over the age of twelve should be vaccinated. … Read more