Mix and match: Clinics see some demand for Sinovac, Sinopharm as COVID
In Singapore, people who originally got Sinopharm are being steered toward either Pfizer or Moderna as a third dose, though they can also get a third dose of Sinopharm if they choose.
Real-world data This NIH study isn't the only data that point to the safety and possible benefits of mixing and matching vaccines.
The researchers also wrote that the reactogenicity, or the vaccine's ability to produce common adverse reactions, "did not differ" between heterologous and homologous boosters.
About 10% of participants who got mixed doses reported severe fatigue, for instance, compared with about 3% for those inoculated with a single type of vaccine, the research shows.
Tan from StarMed suggested that people with links to China were the primary group getting Sinovac shots.
Why are countries mixing vaccines? One of the antibodies generated by the spike protein will be able to deal with the coronavirus mutants by using a cross or what they call heterologous boosting," he said.
Description: There are a lot of COVID-19 vaccines out there at this point, but all of them do the same thing: they train our immune system to recognize a threat by showing something similar to our immune cells.
In contrast to the varying data on the Sinovac vaccine, the Pfizer, Moderna, and Johnson & Johnson vaccines available in the U.S. currently reveal more consistent efficacy rates when studied. According to CDC data, two doses of Pfizer or Moderna are about 94% effective at preventing COVID-19 and one dose of Johnson & Johnson is 66.3% effective. 2
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