BBCNEWS BBC News December 4, 2021 04:08:00
Nearly 3,000 uk volunteers got one of seven different covid vaccines as a booster shot three months after their second dose. thank you very much indeed, everybody. for those boosted with pfizer after two doses of astrazeneca, their antibody levels were 25 times higher than a control group after one month. when pfizer was given after two pfizer shots, antibody levels rose eightfold, but from a much higher initial level. moderna and other combinations also worked well. the study didn't look at omicron. it has mutations in the spike protein, which may make antibodies less able to bind onto it and...