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China Admits Its Vaccines Do Not Work

PLUS: S Korea to resume AstraZeneca jab for ages 30-60

BEIJING (AP) — In a rare admission of the weakness of Chinese coronavirus vaccines, the country’s top disease control official says their effectiveness is low and the government is considering mixing them to get a boost.

Chinese vaccines “don’t have very high protection rates,” said the director of the China Centers for Disease Control, Gao Fu, at a conference Saturday in the southwestern city of Chengdu.

Beijing has distributed hundreds of millions of doses abroad while trying to promote doubt about the effectiveness of the Pfizer-BioNTech vaccine made using the previously experimental messenger RNA, or mRNA, process.

“It’s now under formal consideration whether we should use different vaccines from different technical lines for the immunization process,” Gao said.

Officials at a news conference Sunday didn’t respond directly to questions about Gao’s comment or possible changes in official plans. But another CDC official said developers are working on mRNA-based vaccines.

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“The mRNA vaccines developed in our country have also entered the clinical trial stage,” said the official, Wang Huaqing. He gave no timeline for possible use.

Experts say mixing vaccines, or sequential immunization, might boost effectiveness. Researchers in Britain are studying a possible combination of Pfizer-BioNTech and the traditional AstraZeneca vaccine.

The coronavirus pandemic, which began in central China in late 2019, marks the first time the Chinese drug industry has played a role in responding to a global health emergency.

Vaccines made by two state-owned drug makers, Sinovac and Sinopharm, have been exported to 22 countries including Mexico, Turkey, Indonesia, Hungary, Brazil and Turkey, according to the foreign ministry.

The effectiveness of a Sinovac vaccine at preventing symptomatic infections was found to be as low as 50.4% by researchers in Brazil, near the 50% threshold at which health experts say a vaccine is useful. By comparison, the Pfizer-BioNTech vaccine has been found to be 97% effective.

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Health experts say Chinese vaccines are unlikely to be sold to the United States, Western Europe and Japan due to the complexity of the approval process.

A Sinovac spokesman, Liu Peicheng, acknowledged varying levels of effectiveness have been found but said that can be due to the age of people in a study, the strain of virus and other factors.

Beijing has yet to approve any foreign vaccines for use in China.

Gao gave no details of possible changes in strategy but cited mRNA as a possibility.

“Everyone should consider the benefits mRNA vaccines can bring for humanity,” Gao said. “We must follow it carefully and not ignore it just because we already have several types of vaccines already.”

Gao previously questioned the safety of mRNA vaccines. He was quoted by the official Xinhua News Agency as saying in December he couldn’t rule out negative side effects because they were being used for the first time on healthy people.

Chinese state media and popular health and science blogs also have questioned the safety and effectiveness of the Pfizer-BioNTech vaccine.

As of April 2, some 34 million people in China have received both of the two doses required for Chinese vaccines and about 65 million received one, according to Gao.

The Sinovac spokesman, Liu, said studies find protection “may be better” if time between vaccinations is longer than the current 14 days but gave no indication that might be made standard practice.

S Korea to resume AstraZeneca jab for ages 30-60

By The Associated Press

SEOUL, South Korea — South Korea says it will resume administrating AstraZeneca’s coronavirus vaccine to all eligible people between the ages of 30 and 60.

Last week, South Korea suspended the use of AstraZeneca vaccines for those 60 years old or younger while awaiting the outcome of the European Medicine Agency’s review.

The Korea Disease Control and Prevention Agency said Sunday it will restart the use of AstraZeneca vaccine beginning Monday, citing studies showing that the vaccine’s benefits outweighs the risk of side effects.

An agency statement said those aged 30 or younger will be excluded, as U.K. authorities have recommended they take alternative vaccines.

It says it’s found three cases of blood clots from vaccinated people in South Korea — but none belong to the type of side effects determined by European authorities.

Those who would get AstraZeneca vaccines from Monday include medical workers and people in long-term care facilities, those at special schools and welfare centers for disabled people and homeless people.

In recent days, South Korea has been experiencing a steady increase in new coronavirus infections. Earlier Sunday, South Korea reported 677 new confirmed cases, raising the total to 109,559 with 1,768 deaths.

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