Respiratory syncytial virus, or RSV, is a common virus that usually causes mild, cold-like symptoms, but it can be serious, especially for infants and older adults.
In Idaho, pre-season Respiratory Syncytial Virus (RSV) season surveillance began week ending May 22, 2021 due to reports of increased activity. Routine RSV surveillance started week ending August 14. In 2021-2022, RSV season onset was declared early in Idaho week ending June 12 (MMWR week 23) and surveillance will continue throughout the winter. The start and end of the RSV season follows the National Respiratory and Enteric Virus Surveillance System (NREVSS) and the latest Idaho RSV surveillance data can be found on Get Healthy Idaho.