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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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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