Two vaccines developed by China’s Sinopharm appear safe and effective against COVID-19, according to a study published in a medical journal.
Scientists had been waiting for more details about the two vaccines, although they are already being used in many countries, and one recently won support from the World Health Organization for emergency use.
The report, published online at Journal of the American Medical Association, concluded that both vaccines are about 73% and 78% effective, as previously stated by Sinopharm.
Sinopharm researchers and their local partners in the Middle East say the trial involved about 40,380 participants with the company’s two vaccines — one developed by the Wuhan Institute of Biological Products and the other by the Beijing Institute of Organic Products — and a placebo. The trial took place in four countries: Bahrain, the United Arab Emirates, Egypt and Jordan. However, the study provided data only for Bahrain and the United Arab Emirates.
“There is nothing very surprising. It is consistent with what they have stated above, but it does not completely remove doubts about Sinopharm,” said Jin Dong-yan, a medical professor at the University of Hong Kong who did not participate in the study. .
He raised doubts about his protection vaccine it was based on a recent increase in cases in the island nation of the Seychelles, which had vaccinated a large majority of its population with the Sinopharm vaccine.
The study, conducted mainly in younger men, had little information on the effectiveness of the vaccine against serious diseases. Some experts also expressed concern about the shortage of participating women, with almost 85% of men.
“It’s important to make sure you’ve tested it on enough women to be able to start seeing any possible safety issues,” Ashley St. said. John, Associate Professor at Duke-NUS Medical School in Singapore.
A company spokesman did not immediately respond to a request for comment.
Vaccines, made from inactivated viruses, have already been administered to millions of people worldwide.
The World Health Organization authorized the firing of the Beijing Institute of Biological Products for emergency use in early May, making it the first Chinese vaccine to receive certification.
Chinese Foreign Minister Wang Yi said in April that China has provided vaccines to more than 100 countries, although it has not identified them. Although China uses six vaccines, most of its exports come from two companies: Sinopharm and Sinovac.
Nawal Al Kaabi et al, Effect of 2 inactivated SARS-CoV-2 vaccines on symptomatic COVID-19 infection in adults, JAMA (2021). DOI: 10.1001 / jama.2021.8565
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Citation: Study: Sinopharm COVID-19 vaccines appear safe and effective (2021, May 27) retrieved May 27, 2021 at https://medicalxpress.com/news/2021-05-sinopharm-covid-vaccines-safe- effective.html
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