Mixing Sinovac With Different Boosters Increases Protection

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. The research, published Friday in The Lancet, tested booster combinations on 1,240 people from Brazil above 18 years old who had been immunized with Sinovac’s shot, one of the most widely used globally, six months prior. While those who received a third Sinovac dose did experience a boost in antibodies 28 days later, the level of improvement was found to be much higher in people who were boosted with vaccines from Pfizer Inc., AstraZeneca Plc, or Johnson & Johnson.