A UK phase 2 trial shows that different COVID-19 booster shots are safe and boost immunity when given 10 to 12 weeks after two doses of the AstraZeneca/Oxford or Pfizer/BioNTech vaccines, although immune responses varied widely.In the study, the first randomized trial of COVID-19 booster-provoked immune response, a team led by University of Southampton researchers evaluated safety and immune response among 2,878 participants 30 years or older who received one of seven experimental or control COVID-19 boosters from Jun 1 to 30, 2021.
The findings were published yesterday in The Lancet.Median patient age among participants who had received two doses of the AstraZeneca vaccine 70 or more days earlier was 53 years in one group and 76 in the