A day after a study found that two doses of the vaccine failed to generate a response, Sinovac claimed that a third dose is effective against the omicron variant of the coronaviruses.
More than 800 million doses of Sinovac-made vaccine have been distributed to other nations.
The images are from the same company.
Sinovac said that seven out of 20 people who had received two shots of its CoronaVac vaccine tested positive for neutralizing antibodies, which the vaccine maker says is an efficacy rate of 35%.
The drugmaker said that among 48 individuals who received three doses of CoronaVac, 45 or 94% tested positive for neutralizing antibodies.
The study was based on two samples from Hong Kong and the company is conducting additional studies to offer a more comprehensive evaluation.
Sinovac's CoronaVac is one of the most widely used Covid-19 vaccines across the world and is one of the two Chinese made shots that have received emergency use approval from the World Health Organization.
A study published by the University of Hong Kong raised concerns about the vaccine's effectiveness against the rapidly spreading omicron variant. The 25 people who received CoronoVac had their serum examined and it was found that they did not have any detectable omicron antibodies. The Hong Kong study found that only a small percentage of recipients of the Pfizer-BioNTech vaccine had neutralizing antibodies against the rapidly spreading variant.
The number is big.
There is an amount of 800 million. The data compiled by Beijing based Bridge consulting shows the total number of doses of the Sinovac vaccine that China has distributed around the world. The vaccine dose that was administered in China is not included in this number.
Two Sinovac shots are not enough for omicron.
The Hong Kong researchers want the third shot of COVID-19.
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