Three doses of CoronaVac well prevent the worst outcomes during HK Omicron wave

23 March 2022
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A study of University of Hong Kong revealed that three shots of CoronaVac, developed by China-based Sinovac Biotech (Nasdaq: SVA), offered around 98% protection against death or severe illness in those over 60 years old, underscoring the importance of boosters for those who have received that Covid-19 shot.

Specifically, after the three-dose booster vaccination for people over 60 years old, the effective rate of Sinovac vaccine against severe illness is 97.9%, and the effective rate of the BioNTech (Nasdaq: BNTX) vaccine Comirnaty was 98.0%. The effective rates in preventing death of Sinovac and Comirnaty were 98.3% and 98.1% respectively.

The study also showed that for people over 60 years old, in the case of completing two doses of vaccine, the effective rates of Sinovac and BioNTech in preventing severe illness were 72.2% and 89.6%, respectively; the effective rates in preventing death were 77.4% and 92.3%, respectively.

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