Respiratory Trend Report

Month of May, 2026

Respiratory Trend Report

Month of May, 2026

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HealthTrackRx Trend Update

As the month of May concludes, we look back at the previous month’s respiratory trends to see the overall respiratory season trajectory. As we head into warmer months, it is noteworthy to mention the overall low positivity prevalence of respiratory pathogens. However, Parainfluenza (Types 1-4) has risen slightly in positivity rates starting week of May 10. This slight spike in positivity rate aligns with Parainfluenza Type 3’s prevalence in spring-summer months.

Summer Parainfluenza infections often manifest as cold-like symptoms, croup, or bronchitis, and can spread easily at summer camps, daycares, and pools. Because there is no vaccine or specific antiviral medication, prevention relies on core respiratory hygiene.

HealthTrackRx Trend Update

As the month of May concludes, we look back at the previous month’s respiratory trends to see the overall respiratory season trajectory. As we head into warmer months, it is noteworthy to mention the overall low positivity prevalence of respiratory pathogens. However, Parainfluenza (Types 1-4) has risen slightly in positivity rates starting week of May 10. This slight spike in positivity rate aligns with Parainfluenza Type 3’s prevalence in spring-summer months.

Summer Parainfluenza infections often manifest as cold-like symptoms, croup, or bronchitis, and can spread easily at summer camps, daycares, and pools. Because there is no vaccine or specific antiviral medication, prevention relies on core respiratory hygiene.

Trending Up

  • Parainfluenza Virus (Types 1-4)

Trending Down

  • Respiratory Syncytial Virus (RSV)

  • Influenza A/B
  • Coronaviruses (229E, NL63, HKU1, OC43)

Remaining Level

  • Adenovirus
  • COVID-19 Coronavirus (SARS-CoV-2)

  • Enterovirus/Rhinovirus
  • Human Metapneumovirus
  • Enterovirus D68

Trending Up

  • Parainfluenza Virus (Types 1-4)

Trending Down

  • Respiratory Syncytial Virus (RSV)

  • Influenza A/B
  • Coronaviruses (229E, NL63, HKU1, OC43)

Remaining Level

  • Adenovirus
  • COVID-19 Coronavirus (SARS-CoV-2)

  • Enterovirus/Rhinovirus
  • Human Metapneumovirus
  • Enterovirus D68

7 Day Influenza Virus A/B Map

This report reflects observed trends in HealthTrackRx testing positivity data, does not convey medical advice, and is provided for informational purposes only. Individuals experiencing respiratory symptoms should consult with their healthcare provider.

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HealthTrackRx Respiratory Resource Library
HealthTrackRx Respiratory Resource Library

A collection of whitepapers, articles and webinars from our scientists.