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 …

The COVID-19 pandemic, caused by the severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2), challenged public health systems worldwide. Individuals in low-income …

BACKGROUND Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a virus
of zoonotic origin that can bind to ACE2 receptors on the cells of many wild and domestic …

Unlike severe infections, asymptomatic infections occur independently of healthcare access
and reflect the natural immunity to SARS-CoV-2. What determines their prevalence, ψ, and …

Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) emerged in Israel in
February 2020 and spread from then. In December 2020, the FDA approved an emergency …

Abstract Background The population of South America has been severely affected by the
COVID-19 pandemic. In this region, during the year 2020, high seroprevalence percentages …

Introduction. COVID-19 is a pathology caused by the SARS-CoV-2 virus. The World Health
Organization (WHO) has reported more than 225 million cases and 4.5 million deaths …

Introducción: El COVID-19 ha provocado una emergencia sanitaria, social y del sistema de
salud, con un desconocido comportamiento entre pacientes con condiciones especiales …

Este artículo describe algunas de las acciones que tomó el sistema de salud de Colombia
con el fin de mejorar la capacidad de respuesta a la pandemia de COVID-19 (SARS-CoV-2) …

Objective: To establish the prevalence of IgG antibodies against SARS-CoV-2 and its
relationship with demographic, clinical, and diagnosis variables in a population affiliated …