Since the first cases of COVID-19 were documented in Wuhan, China in 2019, the world has
witnessed a devastating global pandemic, with more than 238 million cases, nearly 5 million …

One year into the global COVID-19 pandemic, the focus of attention has shifted to the
emergence and spread of SARS-CoV-2 variants of concern (VOCs). After nearly a year of …

Background CoronaVac, an inactivated whole-virion SARS-CoV-2 vaccine, has been shown
to be well tolerated with a good safety profile in individuals aged 18 years and older in …

Background The dynamics of vaccination against SARS-CoV-2 are complicated by age-
dependent factors, changing levels of infection, and the relaxation of non-pharmaceutical …

We report that in a cohort of 45,965 adults, who were receiving either the ChAdOx1 or the
BNT162b2 SARS-CoV-2 vaccines, in those who had no prior infection with SARS-CoV-2 …

The effectiveness of COVID-19 vaccination in preventing new severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) infections in the general community is still unclear …

INTRODUCTION The clinical manifestations of COVID-19 vary from asymptomatic infection
to respiratory failure. Severe disease courses are primarily associated with advanced age …

Understanding the causes and consequences of the emergence of severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) variants of concern is crucial to pandemic control yet …

We have come a long way since the start of the COVID-19 pandemic—from hoarding toilet
paper and wi** down groceries to sending our children back to school and vaccinating …

The World Health Organization (WHO) recommended coronavirus disease 2019 (COVID-
19) booster dose vaccination after completing the primary vaccination series for …