The association between current smoking and coronavirus disease 2019 (COVID-19)
progression remains uncertain. We aim to provide up-to-date evidence of the role of …

Although most clinical studies focus on antibodies and cellular immunity in peripheral blood,
mucosal immune responses in the respiratory tract play a key role in the early restriction of …

Conflicting results have been obtained through meta-analyses for the role of obesity as a
risk factor for adverse outcomes in patients with coronavirus disease-2019 (COVID-19) …

Background: The surge of telemedicine use during the early stages of the COVID-19
pandemic has been well documented. However, scarce evidence considers the use of …

Objectives Vaccination has been effective in ameliorating the impact of COVID-19. Here, we
report vaccine effectiveness (VE) of the nationally available COVID-19 vaccines in Mexico …

COVID-19 is a respiratory disease caused by SARS-CoV-2, which has significantly impacted
economic and public healthcare systems worldwide. SARS-CoV-2 is highly lethal in older …

Background Post-acute sequelae after SARS-CoV-2 infection (PASC) remains a concerning
long-term complication of COVID-19. Here, we aimed to characterize the epidemiology of …

The impact of the COVID-19 pandemic in Mexico City has been sharp, as several social
inequalities coexist with chronic comorbidities. Here, we conducted an in-depth evaluation …

Serosurveillance helps establish reopening guidelines and determine the immunity levels in
different populations to reach herd immunity. Then, there is an urgent need to estimate …

Background SARS-CoV-2 testing capacity is important to monitor epidemic dynamics and as
a mitigation strategy. Given difficulties of large-scale quantitative reverse transcription …