BEIJING (Reuters) – Antibodies triggered by Sinovac Biotech’s COVID-19 vaccine decline below a key threshold from around six months after a second dose for most recipients, although a third shot could have a strong boosting effect, according to a lab study.
Chinese researchers reported the findings from a study of blood samples from healthy adults aged between 18-59 in a paper published on Sunday, which has not been peer reviewed.
https://news.yahoo.com/antibodies-sinovacs-covid-19-shot-142748493.html