Health Information Portal (HIP)

Laboratory-Based Surveillance

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.

Week 52

For week 52 of 2022, metapneumovirus reached the highest count so far this season, with counts remaining significantly lower than this time last year. Adenovirus and parainfluenza type 3 detections also increased this week. RSV detections saw a significant drop in activity, reaching similar counts and positivity to this time last year. Parainfluenza type 2 and rhinovirus detections remined the same.

Week 51

For week 51 of 2022, almost all non-influenza respiratory virus activity decreased. Rhinovirus continued to decline after peaking earlier this season. Parainfluenza virus 1 is the only respiratory virus that has increased this week, reaching similar counts to this time last year. RSV detections saw a significant drop in detections. Parainfluenza virus 2, parainfluenza virus 3, adenovirus, human metapneumovirus detections also decreased.

Week 50

For week 50 of 2022, almost all non-influenza respiratory virus activity remained stable or decreased. Counts and positivity for RSV activity are similar to the previous week. Rhinovirus continued to decline after peaking earlier this season. Parainfluenza virus 2 and parainfluenza virus 3 have increased this week, reaching similar counts to this time last year. Parainfluenza virus 1 and adenovirus saw a slight decrease in activity while human metapneumovirus detections were stable.

Week 49

For week 49 of 2022, almost all non-influenza respiratory virus activity remained stable or decreased. Counts and positivity for both RSV and rhinovirus continued to decline after peaking earlier this season. Only adenovirus activity has increased this week, with counts slightly higher than the past three seasons for this time of year. Parainfluenza virus 1, parainfluenza virus 2, and human metapneumovirus saw a slight decrease in activity while parainfluenza virus 3 detections were stable.

Week 48

For week 48 of 2022, rhinovirus was the predominant circulating non-influenza respiratory viruses, with approximately 13% of tested specimens positive for rhinovirus. Rhinovirus activity continues to decline since its earlier peak in September, with activity now lower than previous seasons for this time of year. RSV has also continued to decline in recent weeks, with activity now at similar levels to that of the 2021/2022 season. Parainfluenza virus 1 saw a slight increase in activity while adenovirus, human metapneumovirus, parainfluenza virus 2, and parainfluenza virus 3 detections were stable.

Week 47

For week 47 of 2022, rhinovirus was the predominant circulating non-influenza respiratory viruses, with approximately 17% of tested specimens positive for rhinovirus. Rhinovirus activity continues to decline since its earlier peak in September, and activity overall is similar to previous seasons for this time of year. RSV has also continued to decline in recent weeks along with parainfluenza virus 1. Adenovirus activity has been steady while human metapneumovirus activity has increased slightly. Parainfluenza virus 2 and parainfluenza virus 3 detections have remained low.

Week 46

For week 46 of 2022, rhinovirus was the predominant circulating non-influenza respiratory viruses, with approximately 29% of tested specimens positive for rhinovirus. RSV percent positivity remains higher than previous seasons and had a slight increase in week 46, though has overall continued to decrease in the past few weeks after its early season peak. Adenovirus continues to increase, while human metapneumovirus, parainfluenza virus 1, parainfluenza virus 2, and parainfluenza virus 3 activity decreased.

Please note: data for one of our sentinel hospitals is pending and will be updated once received.

Week 45

For week 45 of 2022, RSV and rhinovirus were the predominant circulating non-influenza respiratory viruses, with approximately 21% of tested specimens positive for RSV and rhinovirus each. RSV percent positivity remains higher than previous seasons but has continued to decrease in the past few weeks after its early season peak. Rhinovirus percent positivity was similar to previous seasons for this time of year and has decreased again after an increase in activity in the previous week. Adenovirus and parainfluenza virus 1 activity continued to increase, while human metapneumovirus, parainfluenza virus 2, and parainfluenza virus 3 activity remained low.

Week 44

For week 44 of 2022, RSV remained the predominant circulating non-influenza seasonal respiratory virus, with approximately 25% of tested specimens positive for RSV. RSV percent positivity was much higher than previous seasons, but the weekly count increase was smaller in comparison to previous weeks. Rhinovirus activity remained elevated. Adenovirus and parainfluenza virus 1 activity continued to increase, while human metapneumovirus, parainfluenza virus 2, and parainfluenza virus 3 activity remained lower.

Week 43

For week 43 of 2022, RSV remained the predominant circulating non-influenza respiratory virus, with approximately 29% of tested specimens positive for RSV. RSV percent positivity is much higher than previous seasons, but the weekly increase has slowed in comparison to previous weeks. Rhinovirus activity is similar to previous seasons for this time of year and continues to decrease. Parainfluenza virus 1 activity continues to increase, while parainfluenza virus 2 has had low levels of activity. Parainfluenza virus 3 has begun to increase along with human metapneumovirus. Adenovirus activity remains consistent with previous seasons for this time of year.

Week 42

For week 42 of 2022, RSV was the predominant circulating non-influenza respiratory virus, with approximately 28% of tested specimens positive for RSV. RSV percent positivity is much higher than previous seasons, a trend also seen in other parts of the country. Rhinovirus activity is also high, but is similar to previous seasons for this time of year. Parainfluenza virus 1 activity has been increasing in recent weeks, while parainfluenza viruses 2 and 3 have had low levels of activity. Human metapneumovirus and adenovirus activity has been consistent with previous seasons for this time of year.

Week 22

For week 22 of 2022, rhinovirus was still the predominant circulating non-influenza respiratory virus, with approximately 17% of tested specimens positive for rhinovirus. Rhinovirus activity was stable this week but has been slowly trending upwards in the past few weeks. RSV activity also was stable this week and remains low overall, similar to previous seasons. Adenovirus activity increased slightly this week, though activity is still similar to the previous season. Human metapneumovirus activity decreased this week, though activity has been trending upwards over the past few weeks despite weekly variation. Parainfluenza viruses 1 and 2 detections remain low; however, parainfluenza virus 3 activity continues to increase and is circulating at higher levels than previous seasons for this time of year.

Week 17

For week 17 of 2022, rhinovirus was the predominant circulating non-influenza respiratory virus, with approximately 15% of tested specimens positive for rhinovirus. Rhinovirus activity was stable this week, and activity remains lower than the previous season for this time of year. RSV activity also was stable this week and remains low overall, similar to previous seasons. Adenovirus activity increased slightly this week, though activity is still similar to the previous season. Human metapneumovirus activity also increased this week. Parainfluenza viruses 1 and 2 detections remain low while parainfluenza virus 3 activity continues to increase, matching previous seasonal increases.

Week 16

For week 16 of 2022, rhinovirus was the predominant circulating non-influenza respiratory virus, with approximately 15% of tested specimens positive for rhinovirus. Rhinovirus activity was stable this week, and activity remains lower than the previous season for this time of year. RSV activity also was stable this week and remains low overall, similar to previous seasons. Adenovirus activity decreased slightly this week, with activity similar to the previous season. Human metapneumovirus activity also decreased this week. Parainfluenza viruses 1 and 2 detections remain low while parainfluenza virus 3 activity continues to increase, matching previous seasonal increases.

Week 15

For week 15 of 2022, rhinovirus was the predominant circulating non-influenza respiratory virus, with approximately 15% of tested specimens positive for rhinovirus. Rhinovirus activity has continued to decrease in recent weeks and activity is lower than the previous season for this time of year. RSV activity increased slightly this week but remains low overall, similar to previous seasons. Adenovirus activity continued to be stable this week, with activity similar to previous seasons as well. Human metapneumovirus activity increased again this week after a drop in activity the previous week. Parainfluenza viruses 1 and 2 detections remain low while parainfluenza virus 3 activity continues to increase, matching previous seasonal increases.

Week 13

For week 13 of 2022, rhinovirus was the predominant circulating non-influenza respiratory virus, with approximately 19% of tested specimens positive for rhinovirus. Rhinovirus activity has begun to slightly decrease in recent weeks and activity is similar to previous seasons for this time of year. RSV activity remains low this week, similar to previous seasons. Adenovirus activity continued to be stable this week, with activity similar to previous seasons as well. Human metapneumovirus activity increased this week. Parainfluenza viruses 1 and 2 detections remain low while parainfluenza virus 3 activity increased, matching previous seasonal increases.

Week 11

For week 11 of 2022, rhinovirus was the predominant circulating non-influenza respiratory virus, with approximately 22% of tested specimens positive for rhinovirus. Rhinovirus activity was stable and remains higher than activity seen in previous seasons before the COVID-19 pandemic. RSV activity decreased this week, with low activity overall, similar to previous seasons. Adenovirus activity was stable compared to last week and is circulating at levels similar to previous years. Human metapneumovirus activity decreased this week and activity overall is lower than seasons before the COVID-19 pandemic. There were no parainfluenza virus 2 detections this week. Parainfluenza virus 1 had a single detection, while parainfluenza virus 3 activity was stable.

Week 10

For week 10 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 21% of tested specimens positive for rhinovirus, a decrease from the previous week. However, rhinovirus activity remains higher than activity seen in previous seasons. In contrast, RSV activity increased compared to the previous week, though it remains lower than seasons before the COVID-19 pandemic. Adenovirus activity decreased slightly and is now circulating at levels similar to previous years. Human metapneumovirus activity decreased this week and activity overall is lower than seasons before the COVID-19 pandemic. There were no parainfluenza virus 1 detections this week. Parainfluenza virus 2 and 3 activity is stable, and both are circulating at levels similar to previous seasons.

Week 7

For week 7 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 23% of tested specimens positive for rhinovirus, another increase from the previous week. RSV activity decreased compared to the previous week and remains lower than seasons before the COVID-19 pandemic. Adenovirus has continued to circulate at levels slightly higher than previous years. Human metapneumovirus activity decreased this week and activity overall is lower than seasons before the COVID-19 pandemic. There were no parainfluenza virus 1 detections this week, parainfluenza virus 2 activity decreased, and parainfluenza virus 3 increased in activity.

Week 6

For week 6 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 15% of tested specimens positive for rhinovirus, another increase from the previous week. RSV activity was stable compared to the previous week, though it remains lower than seasons before the COVID-19 pandemic. Adenovirus has continued to circulate at levels slightly higher than previous years. After consistent decreases the past few weeks, human metapneumovirus activity increased this week, though activity is lower than seasons before the COVID-19 pandemic. Parainfluenza viruses 1 and 3 both had very little activity, while parainfluenza virus 3 increased in activity.

Week 5

For week 5 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 11% of tested specimens positive for rhinovirus, another slight increase from the previous week. RSV activity also increased very slightly, though it remains much lower than seasons before the COVID-19 pandemic. Adenovirus has continued to circulate at levels higher than previous years while human metapneumovirus activity decreased significantly this week. Parainfluenza viruses 1, 2 and 3 each had a single positive specimen this week, with activity overall still low.

Week 4

For week 4 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 7% of tested specimens positive for rhinovirus, a slight increase from the previous week. RSV activity has continued to decrease this week and is currently circulating at lower levels than previous seasons before the COVID-19 pandemic. Parainfluenza viruses 1, 2 and 3 have all decreased again this week, with no positives reported. Adenovirus and human metapneumovirus activity have both had similar activity to previous weeks. Adenovirus activity is slightly greater compared to previous seasons while human metapneumovirus activity is similar to previous years.

Week 3

For week 3 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 5% of tested specimens positive for rhinovirus. Rhinovirus precents are lower than previous seasons this time of year. RSV activity has plateaued this week and is currently circulating at lower levels to previous seasons before the COVID-19 pandemic. Parainfluenza virus 2 activity has plateaued while Parainfluenza virus 3 activity has decreased this week. Parainfluenza virus 1 activity remains low. Adenovirus and Human metapneumovirus activity have both decreased this week. Human metapneumovirus counts are similar to those seen in previous years prior to COVID-19. Note: Data for 4 of the 6 sentinel laboratories have been reported. Data will be further updated once additional data is received.

Week 2

For week 2 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 7% of tested specimens positive for rhinovirus. Rhinovirus percents are similar to previous seasons this time of year. RSV activity has decreased this week and is currently circulating at lower levels to previous seasons before the COVID-19 pandemic. Parainfluenza virus 2 activity has plateaued while Parainfluenza virus 3 activity has decreased this week. Parainfluenza virus 1 activity remains low. Adenovirus has increased this week. Human metapneumovirus activity have decreased this week and is similar to counts seen in previous years prior to COVID-19. Note: Data for 5 of the 6 sentinel laboratories have been reported. Data will be further updated once additional data is received.

Week 1

For week 1 of 2022, rhinovirus remained the predominant circulating non-influenza respiratory virus, with approximately 8% of tested specimens positive for rhinovirus. Rhinovirus precents are similar to previous seasons this time of year. RSV activity has decreased this week and is currently circulating at lower levels to previous seasons before the COVID-19 pandemic. Parainfluenza virus 3 activity has continued to circulate at higher levels than previously seen. Parainfluenza virus 2 activity has plateaued this week and is at levels seen as previous years. Parainfluenza virus 1 activity remains low. Adenovirus and Human metapneumovirus activity have increased this week. Note: Data for 5 of the 6 sentinel laboratories have been reported. Data will be further updated once additional data is received.