Sinovac CoronaVac shot gets strong boost from Pfizer, AstraZeneca, JnJ COVID doses, claims study

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New Delhi: A third booster dose of a COVID-19 vaccine made by AstraZeneca, Pfizer-BioNTech or Johnson & Johnson increases antibody levels significantly in those who have previously received two doses of Sinovac's (SVA.O) CoronaVac shot, a study has found.
The study found that CoronaVac received the strongest boost from a viral vector or RNA shot, including against the Delta and Omicron coronavirus variants, researchers from Brazil and Oxford University said on Monday.
China-based Sinovac's vaccine uses an inactivated version of a coronavirus strain that was isolated from a patient in China. It is currently approved in more than 50 countries including Brazil, China, Argentina, South Africa, Oman, Malaysia, Indonesia and Turkey.
"This study provides important options for policymakers in the many countries where inactivated vaccines ... have been used," said Andrew Pollard, director of the Oxford Vaccine Group and study lead.
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