Respiratory Syncytial Virus (RSV)
RSV Season Has Begun
In Idaho, Respiratory syncytial virus (RSV) season officially began the week ending December 15, 2018 and increased activity has been reported across the state.
The beginning of the RSV season, or season onset, is adapted from the National Respiratory and Enteric Virus Surveillance System (NREVSS). RSV season onset occurs in the first of two consecutive weeks during which the reported total percentage of specimens testing positive for antigen is ≥10%.
The number of cases reported to public health officials have begun to increase since December 15, 2018; RSV activity usually occurs at a low level in the summer and early fall months and then begins to rise sharply in late fall. We will continue to gather surveillance data and provide weekly updates once the season has begun and throughout its duration.
We wish to thank all the participating laboratories for their contributions each year and during this RSV season.