Background paper on Covid-19 disease and vaccines: prepared by the Strategic Advisory Group of Experts (SAGE) on immunization working group on COVID-19 vaccines, 22 December 2020
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World Health Organization
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28 p.
draft prepared by the SAGE Working Group on COVID-19 vaccines, 22 December 2020
draft prepared by the SAGE Working Group on COVID-19 vaccines, 22 December 2020