The research suggests that the Chinese vaccine had little effect against Omicron and that the efficacy of the Pfizer-BioNTech vaccine seemed to wane.
A new study from researchers at the University of Hong Kong found that people who received two doses of a Covid-19 vaccine made by the Chinese pharmaceutical company Sinovac were unable to neutralize the new, highly infectious Omicron variant. The research, which was carried out on 25 vaccinated individuals, is the latest sign of the new challenge Omicron presents as it spreads across the world. The scientists found that none of the 25 subjects vaccinated with Sinovac were able to fight off the variant. The researchers said it was not yet clear whether a third shot of Sinovac would improve the results. Sinovac said in a statement Wednesday that while two doses of its vaccine were much less effective against Omicron, three doses might prevent infection with the variant.
