Sinovac Biotech said on Saturday, February 6, that its unit’s COVID-19 vaccine has been formally approved for use by the general public by China’s medical products regulator.
It marks the second COVID-19 vaccine green-lighted for public use in China, after a shot developed by a Beijing institute affiliated to state-owned China National Pharmaceutical Group (Sinopharm) was approved in December.
Prior to the approvals, both vaccines have already been used in China’s vaccination program mainly targeting key groups deemed to be at higher risk of exposure to the virus.
Indonesia, Turkey, Brazil, Chile, Colombia, Uruguay, and Laos have granted emergency authorizations for the CoronaVac vaccine developed by Sinovac Life Sciences, Sinovac said in a news release.
Approval of the two-dose regimen by China’s National Medical Products Administration is based on the results from two months of late-stage clinical trials overseas, from which the final analysis data has not yet been obtained, Sinovac said.
Sinovac Life Sciences is expected to be able to produce over 1 billion doses per year in the form of bulk ingredient by February, it said in a statement.
It is expanding its capacity to fill vaccine into vials and syringes, which currently lags its vaccine manufacturing capacity.
Varied efficacy rates
Sinovac’s vaccine is being tested in Phase III clinical trials in countries including Brazil, Turkey, and Indonesia, where varied efficacy readings had been released separately.
The vaccine was found 50.65% effective against COVID-19 disease in the Brazil trial which had recruited 12,396 health workers older than 18 as of December 16 and recorded 253 cases, Sinovac said in a statement on Friday, February 5.
The success rate from the Turkey trial was 91.25%, local researchers said, based on a preliminary analysis of 29 cases. There was a 65.3% efficacy rate in the Indonesia trial.
Brazil’s more rampant epidemic, and the trial’s focus on medical workers, are factors that Sinovac believe may have lowered the efficacy rate seen in data from there, a person familiar with the matter told Reuters last month.
The Brazil trial also found the vaccine was 83.7% effective against the disease that requires medical treatment, and 100% effective against hospitalization, severe cases, and death in the same trial, Sinovac said on Friday.
The protection rate was nearly 70% based on observation of a smaller sub-group in the Brazil trial, in which participants received the two doses at a three-week interval rather than two weeks apart for most participants, Sinovac said last month. – Rappler.com