BEIJING — In a rare admission of the weakness of Chinese coronavirus vaccines, the country’s top disease control official says their effectiveness is low and the government is considering mixing them to give them a boost.
The effectiveness rate of a coronavirus vaccine from Sinovac, a Chinese developer, at preventing symptomatic infections has been found to be as low as 50.4% by researchers in Brazil.
Beijing has yet to approve any foreign vaccines for use in China, where the coronavirus emerged in late 2019.
Gao gave no details of possible changes in strategy but mentioned mRNA, a previously experimental technique used by Western vaccine developers while China’s drug makers used traditional technology
As of April 2, some 34 million people have received both of the two doses required by Chinese vaccines and about 65 million received one, according to Gao.
Researchers in Britain are studying a possible combination of Pfizer and AstraZeneca vaccines