Pfizer-BioNTech testing booster of their COVID-19 vaccine in new trial
In the first stage of the first arm of the study, a third 30 microgram dose will be given to as many as 144 people who received the vaccine 6 to 12 months ago in the original Phase I safety trial.
Vials with a sticker reading, "COVID-19 / Coronavirus vaccine / Injection only" and a medical syringe are seen in front of a displayed Pfizer logo in this illustration taken October 31, 2020(photo credit: REUTERS/DADO RUVIC/ILLUSTRATION/FILE PHOTO)ByREUTERS
