Pfizer’s vaccine is made using mRNA technology. Photo: Reuters
Pfizer’s vaccine is made using mRNA technology. Photo: Reuters

Covid-19 vaccines: Sinovac recipients may need two booster shots, says scientist

  • A preprint study suggests adding a dose of Pfizer after two shots of the Chinese vaccine boosts protection but was not enough to stop Omicron infection
  • Sinovac is widely used in China and developing countries

Topic |   Coronavirus pandemic
Pfizer’s vaccine is made using mRNA technology. Photo: Reuters
Pfizer’s vaccine is made using mRNA technology. Photo: Reuters
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