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China’s COVID vaccines have been crucial — now immunity is waning

Billions of shots of China’s CoronaVac and Sinopharm vaccines have been given globally, but studies have questioned the length of protection they offer.
  1. Smriti Mallapaty
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Raimunda Nonata, 70, is inoculated with the Sinovac Biotech's CoronaVac vaccine inside her house in Brazil.

A woman receives a dose of Sinovac’s CoronaVac COVID-19 vaccine in Cachoeira do Piria, Brazil, in January. Credit: Tarso Sarraf/AFP via Getty

China’s CoronaVac and Sinopharm vaccines account for almost half of the 7.3 billion COVID-19 vaccine doses delivered globally, and have been enormously important in fighting the pandemic, particularly in less wealthy nations.

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Nature 598, 398-399 (2021)

doi: https://doi.org/10.1038/d41586-021-02796-w

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