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Mixing Sinovac With Different Boosters Increases Protection

  • Pfizer shot outperforms Astra, J&J, Sinovac in study
  • Brazil study finds that third Sinovac shot is still helpful
A healthcare worker prepares a dose of the Sinovac Covid-19 vaccine during a vaccination drive in Jakarta, Indonesia.

A healthcare worker prepares a dose of the Sinovac Covid-19 vaccine during a vaccination drive in Jakarta, Indonesia.

Photographer: Dimas Ardian/Bloomberg

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People who had two doses of the Covid-19 vaccine made by China’s Sinovac Biotech Ltd. should get boosted with a different shot to amp up their protection against omicron, according to a study by researchers from Brazil and the University of Oxford.