Cumulative steroid dose in hospitalized patients and COVID-19-associated pulmonary aspergillosis.

Background: Severe COVID-19 elicits a hyperimmune response frequently amenable to steroids, which in turn increase the risk for opportunistic infections. COVID-19 associated pulmonary aspergillosis (CAPA) is a complication known to be associated with immunomodulatory treatment. The role of cumulative steroid dose in the development of CAPA is unclear.

Respiratory syncytial virus acute respiratory infection-associated hospitalizations in preterm Mexican infants: A cohort study.

Background: Respiratory syncytial virus (RSV) is the leading cause of severe acute respiratory infections (ARI) in preterm infants. The incidence of RSV-associated hospitalizations has not been defined in Mexico.

Objectives: To determine the incidence of ARI- and RSV-associated hospitalizations in preterm infants during the first year of life.

Post-pandemic influenza-associated mortality in Mexico.

Influenza is a leading cause of respiratory tract infections worldwide and there is limited information on the impact of the influenza A(H1N1)pdm virus on mortality after the 2009 pandemic. Using national mortality register data through 1998-2015 in Mexico, influenza-associated mortality was estimated for respiratory, cardiovascular, and all-cause events. The proportion of influenza-associated respiratory and cardiovascular deaths among different age groups were compared.