Background COVID-19, the coronavirus disease that emerged in December 2019, caused
drastic damage worldwide. At the beginning of the pandemic, available data suggested that …

The COVID-19 pandemic has led the world to undertake the largest vaccination campaign in
human history. In record time, unprecedented scientific and governmental efforts have …

The outbreak of the B. 1.1. 529 lineage of severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2)(Omicron) has caused an unprecedented number of Coronavirus Disease …

Symptoms involving almost every organ system have been reported after SARS-CoV-2
infection. 1 2 3 Estimates of the prevalence of long covid (also called post-covid-19 …

We estimated risks of severe outcomes in 820,404 symptomatic paediatric COVID-19 cases
reported by 10 European Union countries between August 2020 and October 2021. Case …

The parents' attitude toward vaccinating children and adolescents against coronavirus
disease 2019 (COVID-19) remains inconsistent and needs further elucidation. The high …

Background As the epidemic progresses, universal vaccination against COVID-19 has been
the trend, but there are still some doubts about the efficacy and safety of COVID-19 vaccines …

Background Duration of humoral and cellular memory in children previously infected SARS-
CoV-2 or vaccinated and subsequent risk of reinfection is still not fully elucidated. Methods …

Objectives A severe multisystem inflammatory syndrome in children (MIS-C) related to SARS-
CoV-2 has been described after infection. A limited number of reports have analyzed the …

Background Policymakers urgently need evidence to adequately balance the costs and
benefits of mass vaccination against COVID-19 across all age groups, including children …