A health worker holds a syringe and a vial of the Sinovac coronavirus disease (COVID-19) vaccine at a market in Bangkok, Thailand, March 17, 2021.
REUTERS/Athit Perawongmetha/File PhotoBEIJING, Sept 7 (Reuters) - A Chinese study looking at mixing COVID-19 vaccines showed that receiving a booster shot of CanSino Biologics' vaccine after one or two doses of Sinovac Biotech's (SVA.O) vaccine yielded a much stronger antibody response than using the Sinovac shot as a booster.
The study, among the first analyses in China combing different COVID-19 vaccines, comes as the country said it would use booster shots in specific groups amid concerns over vaccines' waning protection over time.
By contrast, those who received a Sinovac booster shot showed a 15.2-fold increase in neutralizing antibody levels, researchers from local disease control authorities, CanSinoBIO and other Chinese institutions said in the paper.
More than 1.4 billion doses of the Sinovac vaccine have been administered globally, about three quarters of them in China.
Athit, Roxanne Liu, Ryan Woo, Miyoung Kim, Susan Fenton
REUTERS, HK, COVID, Thomson
Bangkok, Thailand, BEIJING, China, China . China