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, Respiratory Syncytial Virus (RSV) season surveillance began October 3, 2020 and surveillance stopped May 15, 2021. In 2020-2021, RSV season onset was never declared due to low levels of RSV test percent positivity. The start and end of the RSV season follows the National Respiratory and Enteric Virus Surveillance System (NREVSS).
Although the number of RSV reports to public health officials have declined sharply, RSV activity usually occurs at a low level in the summer and fall months. We will resume gathering weekly updates beginning in October.