Influence of age on the effectiveness and duration of protection in Vaxzevria and CoronaVac vaccines
by Thiago Cerqueira-Silva et al.Background High rates of virus transmission and the presence of variants of concern can affect vaccine effectiveness (VE). Both conditions occur in low-income countries, which primarily use viral vector or inactivated virus vaccine technologies. Such countries conducted few VE analyses, and most lack the power to evaluate effectiveness in subgroups.
3rd September 2021 •
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