Background: To date, coronavirus disease 2019 (COVID-19) becomes increasingly fierce
due to the emergence of variants. Rapid herd immunity through vaccination is needed to …

Background The rapid process of research and development and lack of follow-up time post-
vaccination aroused great public concern about the safety profile of COVID-19 vaccine …

Importance Little is known about the factors associated with COVID-19 vaccine adverse
effects in a real-world population. Objective To evaluate factors potentially associated with …

Importance Safety surveillance of vaccines against COVID-19 is critical to ensure safety,
maintain trust, and inform policy. Objectives To monitor 23 serious outcomes weekly, using …

Importance Pregnant women are at increased risk of morbidity and mortality from COVID-19
but have been excluded from the phase 3 COVID-19 vaccine trials. Data on vaccine safety …

Background To date, no immunological data on COVID-19 heterologous vaccination
schedules in humans have been reported. We assessed the immunogenicity and …

COVID-19 is associated with increased morbidity and mortality in transplant recipients.
There are no efficacy data available regarding these patients with any of the available SARS …

In December 2020, 2 mRNA-based COVID-19 vaccines (Pfizer-BioNTech and Moderna)
were granted Emergency Use Authorization by the US Food and Drug Administration as 2 …

Background Until very recently, vaccines against severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) had not been authorized for emergency use in persons …

Introduction Concerns are prevailing about the safety and side effects of the BNT162b2
mRNA vaccine for coronavirus disease 2019 (COVID-19). Methods A randomized, cross …