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THE 50-percent efficacy rate of the vaccine developed by the Chinese pharmaceutical firm Sinovac Biotech for the coronavirus disease 2019 (Covid-19) is within âacceptableâ limits, a health expert said on Thursday.
Dr. Jaime Montoya, executive director of Philippine Council of Health Research and Development of the Department of Science and Technology, said the vaccine â which was found to be 50-percent effective in a late stage trial conducted in Brazil â is well within the World Health Organizationâs requirement.
The United Statesâ Food and Drug Administration, in a guidance document, said a new Covid-19 vaccine could be approved if it âprevent disease or decreases its severity in at least 50 percent of people who are vaccinated.â