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 48 of 2019, respiratory virus activity remained relatively typical for the time of year compared to recent seasons. Rhinovirus was still the predominant circulating non-influenza respiratory virus in week 48, with approximately 19% of tested specimens positive for the virus. However, rhinovirus activity has been decreasing while respiratory syncytial virus activity increases. Currently, approximately 12% of tested specimens were positive for respiratory syncytial virus. Human metapneumovirus detections have increased while adenovirus activity has remained consistent, both in trends similar to previous years. Parainfluenza type 1 has continued to circulate with higher activity for this time of year compared to previous years, while detections of parainfluenza type 2 and type 3 have remained low.

Laboratory-Based Surveillance Rhinovirus

Laboratory-Based Surveillance Respiratory Adenovirus

Laboratory-Based Surveillance Human Metapneumovirus

Laboratory-Based Surveillance Parainfluenza




Updated: 12/10/2019