Reuters
(Reuters) -A third booster dose of a COVID-19 vaccine made by AstraZeneca, Pfizer-BioNTech or Johnson & Johnson increases antibody levels significantly in those who have previously received two doses of Sinovac’s CoronaVac shot, a study has found. The study found that CoronaVac received the strongest boost from a viral vector or RNA shot, including against the Delta and Omicron coronavirus variants, researchers from Brazil and Oxford University said https://www.ox.ac.uk/news/2022-01-24-mixed-vaccine-schedules-offer-strong-booster-responses-after-two-doses-coronavac on Monday. China-based Sinov…