With tests of Sinovac Biotech Ltd coronavirus vaccine. in Brazil and Turkey which suggest that both sides have a protection rate of 90%, there is not yet a final assessment of its effectiveness in protecting people against Covid-19.
Sinovac is finalizing the results of phase III tests conducted in Brazil, Turkey, Indonesia and Chile, according to someone familiar with the tests. These tests are relatively independent of each other and performed according to different protocols, rather than being governed by unified norms that normally govern such tests, said the person, who requested that no be identified as the data is not public.
Researchers in Brazil earlier in the week he delayed the release of complete information about the Sinovac vaccine, saying only that it was found to be more than 50% effective. Sao Paulo state health secretary Jean Gorinchteyn offered more detailed guidance Thursday, saying the vaccine did not reach 90% effectiveness, making it as successful as those developed by Pfizer Inc. and Moderna Inc.
“We don’t know if it was more than 50%, whether it was 60%, 70% or 80%, but it is at levels that allow us to see the impact of the disease on the population. reduce us, ”Gorinchteyn said in an interview with CBN Radio Brazil. “We knew the efficiency would never reach 90%.”
Turkey Test
Contributing to the controversy, Turkey a test that Sinovac vaccine was taking place in his country showed an estimated efficacy rate of 91.25%. That test, however, is based on only 29 cases, which are considered insufficient to draw a definitive conclusion on the effectiveness of the picture, according to the person familiar with the tests. The lawsuit will continue to gather Covid-19 cases for a final reading, the person said.
A Sinovac spokesman declined to comment on questions about the effectiveness of the vaccine.
The delay in announcing definitive results has created confusion over the effectiveness of the Sinovac bullet. Chinese developers have been slow compared to their western peers in releasing efficiency data, contributing to a decline in confidence in these candidates as the world puts laser focus. air which vaccines are most successful in fighting the pandemic.
Pfizer and Moderna views, meanwhile, have been shown to reduce symbolic issues by more than 90%.
China Race for Covid-19 Vaccines raise safety issues
The reason Brazil has not yet revealed overall efficacy numbers is because Sinovac and its partners are reviewing all Covid-19 cases found among participants, the person said. Brazil’s trial has resulted in more than 170 cases, but Sinovac needs to test them to see if they all meet the criteria set by China’s drug regulator.
Regulators from China and Brazil, as well as Sinovac and its partners are still analyzing data from the Brazilian test, according to the man. Ultimately, Sinovac hopes to see unified standards to ensure uniform comparisons across different test sites, the person said. The protocol for the Brazilian test states that Covid-19 cases are judged according to guidelines from the U.S. Food and Drug Administration.
The late trial of the Sinovac vaccine in Brazil, including around 13,000 participants said the bullet is “safe and effective,” authorities at the Butantan Institute and Sao Paulo state said earlier in the week.
Saving lives
Sinovac promises a successful vaccination to protect more people around the world and save lives, especially in developing countries like Brazil that will have little access to the Pfizer and Moderna scenes. Sinovac bullet may be more suitable for developing countries as it can be kept at normal cooling temperature, while vaccines from Pfizer and Moderna require deep freezing conditions for storage and transportation.
The Sinovac vaccine has been at the heart of a political controversy between Sao Governor Paulo Joao Doria and President Jair Bolsonaro, who says a Chinese vaccine cannot be trusted. Bolsonaro once again questioned the effectiveness of the Sinovac vaccine in a Christmas Eve speech broadcast on Facebook.
“I want to make it clear that the label of this vaccine ‘we are not responsible for any side effects. ‘The responsibility lies with you,’ he said.
– Supported by Andrew Rosati, and Dong Lyu