Pfizer or sinovac better - Does it matter that China's Sinovac COVID vaccine is only 50% effective?

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Meanwhile, as of the 625 Covid-19 Epidemiological Report, Covid-19 active cases are down to levels of the start of the pandemic, despite the entry of the Delta variant.

  • Two percent chose all 10 brands, while 19 percent did not answer.

  • So too is Thailand, where over 600 Sinovac-vaccinated medical staff were infected between April and last month.

  • A novel virus means clinical research is playing out in real-time.




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