Chinese vaccines are ready to fill the gap, do they work?

Taipei – As developed countries surge their supply of COVID-19 vaccines, some parts of the world may have to rely on shots developed by China to overcome the outbreak. Question: Do they work?

There is no apparent reason to believe they wouldn’t, but China has a history of vaccine scandals, and the drug company internally has their final human trials and more than a million emergency vaccinations they say. Already a country that has hardly revealed what was done.

Wealthy countries have booked about 9 billion of the 12 billion shots developed primarily in the West that are expected to be produced next year, but to ensure equal access to the COVID-19 vaccine. COVAX, a global initiative, has doses below the promised 2 billion volumes.

China may be the only solution for countries that have not yet secured the vaccine.

China has six candidates in the final stages of the trial and is one of the few countries capable of producing vaccines on a large scale. Government officials announced the administration ability of next year billion times, Xi Jinping president vowed to bring benefit to the world China’s vaccine.

With the potential for millions of people in other countries to use the vaccine, China shows the world that it can repair the reputational damage caused by cross-border outbreaks and become a major scientific player. I am giving you an opportunity.

But past scandals have undermined public confidence in vaccines, and manufacturing and supply chain issues have questioned whether it can really be a savior.

“There remains a question mark on how China can ensure reliable vaccine delivery,” said Joy Chan, a professor of emerging science ethics at the University of Kent in the United Kingdom. She quoted China’s “Transparency to Scientific Data and a Problematic History of Vaccination”.

Bahrain joined the United Arab Emirates last week, making it the second country to approve China’s COVID-19 vaccine. Morocco plans to use the Chinese vaccine in a mass vaccination campaign scheduled to begin this month. Chinese vaccines are also awaiting approval in Turkey, Indonesia and Brazil, but are being tested in more than 12 countries, including Russia, Egypt and Mexico.

In some countries, Chinese vaccines are considered suspicious. Brazil’s President Jair Bolsonaro repeatedly questioned the effectiveness of the Chinese company Sinovac’s vaccine candidate, without quoting evidence, saying that Brazilians would not be used as “Guinea pigs.”

Many experts praise China’s vaccine capacity.

“The study seems to be doing well,” said Jamie Triccus, head of immunology and infectious diseases at the University of Sydney School of Medicine, referring to the results of clinical trials published in scientific journals.

China has been building vaccination programs for over 10 years. Jin Dong-yang, a medical professor at the University of Hong Kong, said he is producing large-scale successful vaccines for his population, including vaccination against measles and hepatitis.

“There are no outbreaks in China for any of these diseases, which means vaccines are safe and effective.”

China has been working with the Gates Foundation and others for the past decade to improve manufacturing quality. The World Health Organization has pre-certified five non-COVID-19 Chinese vaccines. This allows UN agencies to purchase them for other countries.

Companies whose products have been pre-certified include Sinovac, the leading developer of the COVID-19 vaccine, and the state-owned Sinopharm.

Still, the Wuhan Institute of Biological Products, a subsidiary of Sinopharm behind one of the COVID-19 candidates, was involved in a vaccine scandal in 2018.

Government inspectors have discovered that the city-based company, where the coronavirus was first detected last year, has disabled hundreds of thousands of diphtheria, tetanus, and whooping cough vaccines due to equipment failures. did.

That same year, it was reported that Changsheng Bio-Tech tampered with data on the rabies vaccine.

In 2016, Chinese media revealed that two million doses of various vaccines for children had been improperly stored and sold nationwide for many years.

After these scandals, vaccination coverage declined.

“All my local Chinese friends are white-collar, wealthy, and no one buys Chinese medicine. That’s right,” said Ray, a former country director of the Gates Foundation in China. Yip said. He said he was one of the few who didn’t mind buying Chinese medicines.

China amended its law in 2017 and 2019 to strengthen control over vaccine storage and to test and penalize defective vaccines.

The country’s leading COVID-19 vaccine developers have published several scientific findings in peer-reviewed scientific journals. However, international experts questioned how China recruited volunteers and what follow-up was on possible side effects. Chinese companies and government officials have not released details.

Experts are now waiting to see the results in China after the data on the efficacy of the Western vaccine developed by Pfizer and Moderna have been released. UAE regulators who have tested the Sinopharm vaccine say they are 86% effective based on interim clinical trial data. On Thursday, the Turkish government announced that Sinovac was 91.25% valid from the interim data.

Sinopharm did not respond to requests for comment on vaccine efficacy data. Other Chinese vaccine companies, Sinovac and CanSino, did not respond to the interview request.

The country of origin of the vaccine is not important to some people in countries where the pandemic shows no signs of mitigation.

“Hopefully, I’ll take the one that comes first,” said Daniel Alves Santos, a restaurant chef in Rio de Janeiro. “And I hope God can help me.”


Associated Press writer David Biller of Rio de Janeiro and María Verza of Mexico City contributed to this report.

Copyright 2020 AP communication. all rights reserved. This material may not be published, broadcast, rewritten, or redistributed without permission.

Chinese vaccines are ready to fill the gap, do they work?

Source link Chinese vaccines are ready to fill the gap, do they work?

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