Covid-19. Efficacy, availability, side effects… Five questions about Pfizer’s vaccine
A ray of hope was born yesterday, Monday, November 9, when the American laboratory Pfizer and the German biotechnology company BioNTech announced that they had developed a vaccine “90% effective” against Covid-19. In the aftermath of this announcement, which suggests a way out of the health crisis, questions remain. When will it be available? The … Read more