@CoolDude @abolab
 

La disparition du bras placebo :

The BMJ asked Moderna, Pfizer, and Janssen (Johnson and Johnson) what proportion of trial participants were now formally unblinded, and how many originally allocated to placebo have now received a vaccine. Pfizer declined to say, but Moderna announced that “as of April 13, all placebo participants have been offered the Moderna covid-19 vaccine and 98% of those have received the vaccine.”2 In other words, the trial is unblinded, and the placebo group no longer exists.

Covid-19 vaccines : In the rush for regulatory approval, do we need more data ?