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Home Coronavirus

Hong Kong Study Finds Sinovac Booster Not Enough To Fend Off Omicron

Though mixing Sinovac with a Pfizer booster seems to produce protective levels of antibodies.

by Ikmal Rozlan
December 26, 2021
sinovac booster omicron

[Original photo: Sinovac]

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A new study has revealed that even a third dose of Sinovac’s CoronaVac COVID-19 vaccine is not enough to provide protection against the Omicron variant, which has already become the dominant strain in the UK and the US. The study was done by the University of Hong Kong and the Chinese University of Hong Kong, with funding from the Hong Kong government.

The study revealed that neither the Sinovac nor the Pfizer-BioNTech vaccines generate enough neutralising antibodies to fight Omicron with only two doses, although Pfizer has already revealed that a booster of its mRNA vaccine induces enough antibodies to fend off against the new variant. The Hong Kong research found that giving Sinovac recipients the German jab achieves the same effect, whereas Sinovac boosters failed to do so.

sinovac covid-19 vaccine vials
[Photo: COVID-19 vaccination/Flickr]

Sinovac’s CoronaVac is one of the most-used vaccines in China and in developing countries, with more than 2.3 billion doses produced and shipped out. In Malaysia, Sinovac shots make up 36.6% of all vaccines used, according to COVIDNOW.

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Even before the Omicron variant was discovered, the efficacy of the China-made vaccine had already been scrutinised and found to wane much faster than Pfizer or AstraZeneca. This discovery, along with the threat of Omicron, had prompted the government to make boosters a requirement for Sinovac recipients to maintain their fully vaccinated status.

(Source: Bloomberg)

Tags: boosterCOVID-19omicronSinovacvaccine
Updated 6:42 am, Mon, 27 December 21
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