It was my understanding that people had to sign up for the trial testing. And only a percentage of those in the trial received the placebo. But. I also read that those that did get the placebo were later allowed to take the vax. Which makes the control group compromised. But please don't take my word.
It was my understanding that people had to sign up for the trial testing. And only a percentage of those in the trial received the placebo. But. I also read that those that did get the placebo were later allowed to take the vax. Which makes the control group compromised. But please don't take my word.