@bubu12

https://www.bmj.com/content/375/bmj.n2635

According to the trial’s design, unblinded staff were responsible for preparing and administering the study drug (Pfizer’s vaccine or a placebo).

Donc, déjà, c’est du simple aveugle...

"This was to be done to preserve the blinding of trial participants and all other site staff, including the principal investigator."

Je mets ça entre guillemet car personne ne devrait connaitre quel est le produit administré.

However, at Ventavia, Jackson told The BMJ that drug assignment confirmation printouts were being left in participants’ charts, accessible to blinded personnel.

=> "Early and inadvertent unblinding may have occurred on a far wider scale."