Bottles of the Sinovac vaccine are seen at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

Antibodies from Sinovac’s COVID-19 shot fade after about 6 months, booster helps – study

BEIJING (Reuters) – Antibodies triggered by Sinovac Biotech’s COVID–19 vaccine declined below a key threshold from around six months after a second dose for most recipients, although a third shot had a strong booster effect, according to a Chinese study. Chinese researchers reported the…

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REUTERS/Lee Smith

Third AstraZeneca vaccine shot produces strong immune response – study

LONDON (Reuters) – A third shot of the Oxford-AstraZeneca COVID-19 vaccine produces a strong immune response, researchers said on Monday, adding there was not yet evidence that such shots were needed, especially given shortages in some countries. The Oxford University study found that a third…

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