Doctor Manop reveals the results of the Hong Kong medical team Research Summary: Pfizer Vaccine Boosts Immunity Better Than Sinovac Vaccine
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On June 26, 64, reporters reported that Prof. Dr. Manop Phithakphakorn, head of the Research Center for Excellence in Medicine, Siriraj, posted a Facebook post that last week, many people had seen the news from a team of researchers from HKU. In the Hong Kong Medical Journal, two days prior to early release data were presented in the Hong Kong Medical Journal comparing anti-spike antibody and surrogate levels. neutralizing antibody of healthcare professionals vaccinated with Pfizer or Sinovac after the first dose. and after two injections, approximately 200 people per group
The results showed that antibody levels measured by three techniques (Roche, Genscript and Abbott) in the plasma of Pfizer vaccinated subjects were significantly higher than that of Sinovac. The same height, or slightly higher than the person who received two full Sinovac shots. And those who received two full doses of Pfizer and were tested with the Roche and Genscript test kits would likely be so high they hit the ceiling of measurement. This makes it difficult to compare the antibody levels of those who received the Sinovac vaccine, but when looking at the antibody levels measured with the Abbott assay, the antibody levels of those who received two doses of Pfizer were approximately 11 times higher than those of Sinovac.
Comparative studies between Sinovac and Pfizer vaccines are rare, as few countries currently have large amounts of both vaccine brands. Hong Kong is a good place to do this study. This is because the proportion of people vaccinated with both types of vaccines is the same. While this is not an exact measure of vaccine effectiveness (VE), it is a good surrogate.
Please read the full text here. https://www.hkmj.org/earlyrelease/hkmj219605.htm