Testing and masking policies and hospital-onset respiratory viral infections (27 November 2024)

Summary

Most hospitals have stopped testing all patients for Covid-19 when they are admitted and no longer require masking. Ten hospitals in the Mass General Brigham hospital system ended both these precautions simultaneously in May 2023 but restarted masking for health care workers in January 2024 during a winter respiratory viral surge. This study in JAMA Network Open looked at the association of these changes with the relative incidence of hospital-onset Covid-19, influenza and respiratory syncytial virus (RSV).

The study showed that stopping universal masking and Covid-19 testing was associated with a significant increase in hospital-onset respiratory viral infections relative to community infections. Restarting the masking of health care workers was associated with a significant decrease.