[Association between influenza vaccination and mortality due to COVID-19].

Background: It has recently been suggested that influenza vaccination may be a factor associated with decreased COVID-19 mortality.

Methods: An age-matched case-control study based on hospital cases. We included subjects aged 18 years and older with a diagnosis of moderate to severe COVID-19.

COVID-19 epidemiology in a Mexican tertiary care hospital.

Introduction: As a result of COVID-19, many hospitals underwent a conversion for the care for this disease.

Objective: To analyze COVID-19 hospital epidemiological behavior from March to August 2020.

Methods: Through a series of cases, COVID-19 epidemiological behavior at the hospital was analyzed, for which simple case rates, percentages and incidence of COVID-19 per 100 hospital discharges were estimated.