Booster with Pfizer vaccine gives more protection to those who received Chinese vaccine
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A booster dose with a messenger RNA vaccine (such as Pfizer or Moderna) to a person who has been immunized with CoronaVac (from Sinovac, the Chinese vaccine) offers a considerably superior protection against covid-19 compared to booster with the same vaccine. In fact, two doses of CoronaVac provide protection almost nil. A observational study conducted […]