According to the latest real-world observation data in Chile, a booster shot of Sinovac’s CoronaVac COVID-19 vaccine can lift protection to 80%, Global Times reported.
Specifically, increased effectiveness against COVID-19 14 days after the third dose can reach 80.2%, up from 56%, while increasing the effectiveness against hospitalization by 88%, up from 84%.
Sinovac denied the claim by some media reports that the booster shot is less effective if administered more than six months after the completion of the second dose. Previous studies have shown a significant increase in neutralizing antibody levels after taking a booster shot eight months after the second shot, Sinovac said.
Sinovac noted that the research data shows that all adverse reactions were grade 1 or 2 after the booster shot, and no serious adverse reactions were directly caused by the vaccine.
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