Most cases of coronavirus disease 2019 are mild or asymptomatic. Therefore, many cases
remain unrecorded. We determined seroprevalence of IgG antibodies against severe acute …

BACKGROUND SARS-CoV-2/COVID-19, which emerged in China in late 2019, rapidly
spread across the world with several million victims in 213 countries. Switzerland was …

Background The COVID-19 pandemic resulted in adaptation in infection control measures,
increased patient transfer, high occupancy of intensive cares, downscaling of non-urgent …

Background Italy was the first western country to experience a large Coronavirus Disease
2019 (COVID-19) outbreak and the province of Bergamo experienced one of the deadliest …

Background COVID-19 pandemic mitigation measures, including travel restrictions, limited
global circulation of influenza viruses. In Australia, travel bans for non-residents and …

Background In the night of February 20, 2020, the first epidemic of the novel coronavirus
disease (COVID-19) outside Asia was uncovered by the identification of its first patient in …

Introduction While the reduction in influenza cases in the Northern hemisphere in 2020 has
been widely reported, the influenza transmission dynamics in the Southern hemisphere …

By 9 December 2021, 785 SARS-CoV-2 Omicron variant cases have been identified in
Denmark. Most cases were fully (76%) or booster-vaccinated (7.1%); 34 (4.3%) had a …

On 21 February 2020, a resident of the municipality of Vo', a small town near Padua (Italy),
died of pneumonia due to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) …

Whenever a new variant of SARS-CoV-2 emerges and is of concern, the scientific
community races to understand its characteristics. Is this variant less or more transmissible …