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In a rare admission, Chinese official says home-grown vaccines effectiveness low

Chinese vaccines effectiveness low, admits country s top disease control official

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. By comparison, the vaccine made by Pfizer has been found to be 97% effective.

Sinovac maker advises longer gaps between doses

Last Updated: Sinovac Maker Advises Longer Gaps Between Doses Chinese COVID-19 vaccine maker Sinovac said it recommends longer intervals between two doses to achieve better effectiveness after the country s top CDC official admitted the weakness of Chinese coronavirus vaccines. Chinese COVID-19 vaccine maker Sinovac said it recommends longer intervals between two doses to achieve better effectiveness after the country s top CDC official admitted the weakness of Chinese coronavirus vaccines. Liu Peicheng, Spokesperson for Sinovac, one of the Chinese COVID-19 vaccine producers that have distributed millions of doses domestically and in other countries, acknowledged at a press conference on Sunday that varying levels of effectiveness have been found.

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