China is Starting Clinical Trials of a Covid Vaccine That Ca
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China’s CanSino Biologics will be starting clinical trials for a Covid-19 vaccine that is administered through inhalation next week, the company’s co-founder and Chief Executive Xuefeng Yu told. An inhaled vaccine could be more effective than those injected given that the coronavirus enters the human body through the airways.

Yu explained that theoretically, an inhaled vaccine could provide additional protection by activating antibodies or T cells, white blood cells that are vital to the immune system, in the airways. If that protection layer fails and the virus travels deeper into the body, other parts of the immune system could still fight the Covid virus, added Yu.

The CEO said the company has used the same concept to develop an inhalation vaccine for tuberculosis or TB. Trials conducted in Canada showed that the inhaled dosage for the TB vaccine needed to provide protection is “much, much less than the actual injection,” he said.

~ Boosting vaccine efficacy

CanSinoBIO’s single-dose injected Covid vaccine has been approved for use in several countries including China, Pakistan, Mexico and Hungary. The company said interim data from phase three clinical trials overseas showed its vaccine was 68.83% effective at preventing symptomatic Covid-19 disease two weeks after one injection, while the rate fell to 65.28% after four weeks.

Yu said CanSinoBIO has studied adding a booster shot six months after the first injection, which managed to improve the immune response to the coronavirus. That’s also indicating that our vaccine could be boosted whether it’s being mixed with others or do it our own, I think that needs truly a scientific study. We need to actually have data to demonstrate which way could be better,” said the CEO.

Chinese researchers are testing mixing Covid vaccines developed by CanSinoBIO and a unit of Chongqing Zhifei Biological Products. The trial, under way in the eastern city of Nanjing, is expected to involve 120 participants, said the report.

Dr. H●●●●t K●●●r
Dr. H●●●●t K●●●r General Medicine
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Apr 20, 2021Like1