Vaccination, especially with multiple doses, provides substantial population-level protection
against COVID-19, but emerging variants of concern (VOC) and waning immunity represent …

Abstract Objectives The SARS-CoV-2 BQ. 1* variant rapidly spread globally in late 2022,
posing a challenge due to its increased immune evasion. Methods We conducted a …

Abstract Background and Aims SARS‐CoV‐2 infection is a public health concern. Several
aspects related to the pattern of infection remain unclear. This study aimed to investigate the …

Background People in low-income countries, especially those with low socio-economic
conditions, are likelier to test positive for SARS-CoV-2. The unequal conditions of public …

Background The first chikungunya virus (CHIKV) outbreaks during the modern scientific era
were identified in the Americas in 2013, reaching high attack rates in Caribbean countries …

Introduction Few community-based interventions addressing the transmission control and
clinical management of COVID-19 cases have been reported, especially in poor urban …

Background The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron
variant has spread globally. However, the contribution of community versus household …

Background The management of the SARS-CoV-2 pandemic depends amongst other
factors on disease prevalence in the general population. The gap between the true rate of …

1 Epidemiology of COVID-19 Page 18 CHAPTER 1 Epidemiology of COVID-19 Sten H.
Vermund • Mahima Kaur Introduction Human Coronaviruses and the Emergence of SARS-CoV-2 …

Estimating seroprevalence and vaccination coverage against COVID-19 is crucial to the
development of well-targeted public health policies at the local level. Here, we estimated …