Safety and effectiveness of COVID-19 vaccines during pregnancy is a particular concern
affecting vaccination uptake by this vulnerable group. Here we evaluated evidence from 23 …

Pregnancy is an independent risk factor for severe covid-19. Vaccination is the best way to
reduce the risk for SARS-CoV-2 infection and limit its morbidity and mortality. The current …

Abstract SARS-CoV-2 Omicron BA. 1 and BA. 2 subvariants are genetically divergent. We
conducted a matched, test-negative, case-control study to estimate duration of protection of …

Background Infants younger than 6 months of age are at high risk for complications of
coronavirus disease 2019 (Covid-19) and are not eligible for vaccination. Transplacental …

Background The protection conferred by natural immunity, vaccination, and both against
symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection with …

Waning SARS-CoV-2 Immunity in Qatar The protection afforded by the mRNA-1273 vaccine
against SARS-CoV-2 infection in Qatar seemed to wane over several months after …

Billions of doses of coronavirus disease 2019 (COVID-19) vaccines have been administered
globally, dramatically reducing severe acute respiratory syndrome coronavirus 2 (SARS …

With the global expansion of the highly transmissible SARS-CoV-2 Delta (B. 1.617. 2)
variant, we conducted a matched test-negative case–control study to assess the real-world …

Importance Pregnant people are at high risk for severe COVID-19 but were excluded from
mRNA vaccine trials; data on COVID-19 vaccine effectiveness (VE) are needed. Objective …

Importance The risk and benefits of COVID-19 vaccination during pregnancy are under
investigation. Pooled evidence regarding neonatal and maternal outcomes in association …