Sinovac Vaccine Recipients Need To Know This for Protection from Omicron


Recipients of the Sinovac vaccine (CoronaVac) may need two other booster vaccine injections to provide protection against the Omicron variant of Covid-19.

This is the result of preliminary research conducted by Yale University with the Ministry of the Dominican Republic and other institutions. The research is currently published in the online journal medRxiv but has not been peer-reviewed by other health professionals.

The study initially mixed two doses of Sinovac vaccine with one booster dose of Pfizer vaccine. As a result, the immune response produced by the vaccine mixture was lower against the Omicron variant.

'In this study it was found that two doses of the Sinovac vaccine plus the Pfizer booster vaccine produced an antibody response similar to that of the two-dose mRNA vaccine. The mRNA vaccine was developed by Pfizer and Moderna.

The study revealed that the vaccine mix resulted in antibody levels to Omicron being 6.3-fold lower when compared to the initial Covid-19 variant and 2.7-fold lower when compared to the Delta variant.

Akiko Iwasaki, one of the study's authors, said on Twitter that CoronaVac (Sinovac vaccine) recipients may need two additional booster doses to achieve the required level of protection against Omicron.

Based on a study analyzing a sample of 101 participants in the Dominican Republic, two doses of Sinovac vaccine did not exhibit a detectable neutralizing response to Omicron.

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