Respiratory Syncytial Virus Suppression through Public Health and Social Measures, Hong Kong, China, 2020-2023.
Public health measures during COVID-19 were associated with reduced respiratory syncytial virus cases in Hong Kong, China. Mask wearing was associated with a 35% reduction; avoidance behaviors and hand hygiene were also associated with reductions. After the mask mandate was lifted in March 2023, we observed resurgence in RSV activity.