A health care worker prepares a dose of the Sinopharm Covid-19 vaccine. Photo: AP
A health care worker prepares a dose of the Sinopharm Covid-19 vaccine. Photo: AP

Omicron and Delta show China needs to boost Covid-19 variant defence, top expert says

  • Vaccination has brought herd immunity, but against the original Sars-CoV-2 strain, Zhong Nanshan points out
  • The best vaccine is the one you can get, adviser to WHO chief says, as lab studies question efficacy of China’s widely administered inactivated shots

Topic |   Coronavirus pandemic
A health care worker prepares a dose of the Sinopharm Covid-19 vaccine. Photo: AP
A health care worker prepares a dose of the Sinopharm Covid-19 vaccine. Photo: AP
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