Prevention of COVID-19 superspreading events in buses boarded by presymptomatic cases.

Introduction: COVID-19 superspreader events have occurred when symptomatic individuals without wearing face masks boarded buses.

Objective: To report the risk of superspreader events when presymptomatic individuals boarded buses to-gether with unvaccinated passengers, but with non-pharmacological preventive interventions being maintained.

Methods: Prospec-tive study of health personnel transported in buses to a COVID-19 vaccination center for two weeks.

Significant Rise in SARS-CoV-2 Reinfection Rate in Vaccinated Hospital Workers during the Omicron Wave: A Prospective Cohort Study.

Background: Relatively low SARS-CoV-2 reinfection rates have been reported in vaccinated individuals, but updates considering the Omicron variant are lacking.

Objectives: The objective of the study was to provide a current estimate of the SARS-CoV-2 reinfection rate in a highly immunized population.

Methods: A prospective cohort of Mexican hospital workers was followed (March 2020-February 2022).

Factors Associated with COVID-19 and Asymptomatic Carriage in Healthcare Workers of a COVID-19 Hospital.

Background: Risk factors for coronavirus disease (COVID-19) and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) asymptomatic carriage (AC) in healthcare workers (HCWs) have been scarcely characterized.

Objective: The objective of the study was to study factors associated with COVID-19 and AC in HCWs of a COVID-19 academic medical center.

Methods: This is a case-control study.