A recent study published in JAMA Network Open reveals increased rates of hospital-onset respiratory viral infections, inclusive of respiratory syncytial virus (RSV) and coronavirus, following the reduction of hospital-wide masking and SARS-CoV-2 testing. According to Theodore Pak, MD, PhD, from Massachusetts General Hospital, the adjustments to infection prevention measures resulted in a significant 25% surge of in-hospital onset of respiratory infections.
RSV is noted as a leading cause of acute respiratory tract infections among adults, resulting in severe outcomes for high-risk individuals. In the United States, with an estimated 159,000 RSV-related hospitalizations occurring annually among adults aged 65 and older. RSV, a highly contagious virus, spreads through droplets, contaminated surfaces, and dried secretions. The practice of wearing masks, maintaining physical distance, and regular testing typically help in curbing the spread of RSV and other similar respiratory viruses. However, recent policy changes in many hospitals have led to a reduction in mask usage and limited testing.
The research team conducted an extensive cohort study comparing the incidence of hospital-onset SARS-CoV-2, influenza, and RSV in Mass General Brigham hospital system’s ten hospitals. The study included data spanning from November 6, 2020, to March 21, 2024, divided into four periods. The periods were defined based on the Omicron variant and the corresponding policies on admission testing and masking.
The data analysis revealed that the ratio of hospital-onset to community-onset infections significantly increased following the termination of universal masking and testing. However, with the reinstatement of masking requirements for health care providers, the ratio observed a decrease. The study explicitly demonstrated a 25% increase in hospital-onset respiratory infections during the period without universal masking and testing, compared to the preceding Omicron-dominant phase. However, the research revealed a 33% drop following the reintroduction of masking for healthcare providers.
The study’s findings highlight the vital role of preventive measures like masking and testing in controlling the spread of respiratory viruses in hospital settings. As the threat of SARS-CoV-2 looms, healthcare providers are urged to reassess policies and consider reintroducing preventive measures to safeguard patient health.