Synovac’s Kovid-19 vaccine is effective in Brazilian trials

São Paulo-Synovac Biotech Ltd.’s Kovid-19 vaccine, which scientists hope could help combat the epidemic in the developing world, has exceeded the 50% threshold for efficacy in late-stage trials in Brazil , Meaning that regulators can beat it for use in light, people involved in its development said.

Brazil is the first country to complete the first phase 3 trials of the Chinese company’s Coronavac vaccine, which is also being tested in Indonesia and Turkey. Kovid-19 is largely under control in China, with the country’s vaccine developers having to conduct their own clinical trials abroad.

Those involved in the Brazilian trials, which completed Phase 3 last week, told The Wall Street Journal that the results showed Coronavac with a more than 50% effective rate, the threshold for a vaccine considered viable by international scientists is. People refused to give any further information. But scientists tracking the development of the vaccine say they expect it to show efficacy compared to other Kovid-19 vaccines that have proven to be 95% effective in trials.

“Everyone is expecting an efficacy rate of over 90%,” said Domingos Alves, a professor at Ribeiro Preto Medical School in Sao Paulo, who specializes in analyzing health data. “Results from the first stages of the tests were very good.”

The Brazilian Butanan Institute, a São Paulo state government-backed research center that is testing Coronavac, is set to announce the vaccine’s efficacy rate on Wednesday. Butanon said on Monday that it considers any information given at this time on the efficacy of the vaccine as “mere speculation”.

Sao Paulo Village. João Doria said that his plan is to have about one fifth of the Brazilian population, about a year before the Brazilian population promised to vaccinate the rest of Brazil.

Rio de Janeiro’s Ipanema Beach on Sunday.


Fabio Moto / Shutterstock

Mr Doria said the results of the Phase 3 trials of Coronavac would be presented to regulators in both China and Brazil on Wednesday, stating that the state of São Paulo plans to begin the vaccine on 25 January.

Butanon, which began production of Synovac vaccines in Brazil this month, has agreed to become a distributor of Coronavac in Latin America with the private Chinese firm. In May, Butanton planned to begin shipping the vaccine to Argentina, Bolivia, Colombia, Honduras, Peru and Uruguay, but Butanan’s director, Dimas Covas, said in an interview.

More on Kovid-19 Vaccines


As wealthy countries buy supplies of Western drugmakers Kovid-19 vaccines that are still under development, China and Russia are offering their fast-track shots to poor nations. Here they are expected to meet in return. Illustration: Kenya Shekhutdinova

Write Samantha Pearson at[email protected] and Luciana Magalhaes at [email protected]

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