The following graphs depict the aggregate results of PDPH's respiratory virus surveillance. Care should be taken with the interpretation of these results.

These summaries display the provisional, year-to-date counts (or, in some cases, percentage positivity) of respiratory viruses by week of report. Comparable data for preceding years are shown as well.

All surveillance data are preliminary and are not intended for further distribution.

Activity Summary

For week 1 of 2020, respiratory virus activity was relatively typical for the time of year. Notably, human metapneumovirus detections have been elevated compared to recent seasons. However, respiratory syncytial virus (RSV) was the predominant circulating non-influenza respiratory virus in week 1, with approximately 18% of tested specimens positive for RSV. RSV activity has been similar to trends in recent years. Rhinovirus activity continues to decrease. Parainfluenza type 1 detections have also decreased rapidly after a period of higher activity in November. Detections of parainfluenza type 2 and type 3 have remained low while adenovirus activity has been consistent with trends in previous years.

Laboratory-Based Surveillance Rhinovirus

Laboratory-Based Surveillance Respiratory Adenovirus

Laboratory-Based Surveillance Human Metapneumovirus

Laboratory-Based Surveillance Parainfluenza




Updated: 01/16/2020