Mon, September 27, 2021

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Third shot of Sinovac COVID-19 vaccine gives big boost to immunity: study


Researchers found that the additional shot will lead to a big increase in antibody levels, with geometric mean titers assessed 14 days later increasing to 137.9, or approximately three-fold.

 A third shot of Sinovac COVID-19 vaccine administered six months or more after the second dose will give a remarkable boost to people's immunity against the deadly virus, a new study has found.

The study was published on Medrxiv.org on Sunday for peer review.

Chinese researchers inoculated over 500 participants with a third dose six to eight months after their second jabs, and they found that the additional shot will lead to a big increase in antibody levels, with geometric mean titers assessed 14 days later increasing to 137.9, or approximately three-fold.

The study also found that although neutralizing antibody levels declined six months after two Sinovac shots, a two-dose schedule generates good immune memory.

The research is consistent with recent studies over booster immunization with the AstraZeneca vaccine, which have showed higher concentrations of total antibodies after a third dose.

Photo taken on Dec. 23, 2020 shows the packing line for inactivated COVID-19 vaccine of Sinovac Biotech, a Chinese biopharmaceutical company, in Beijing, capital of China

Published : July 30, 2021

By : xinhua