Respiratory Trend Report

Week ending March 8th, 2026

HealthTrackRx
Trend Update

Respiratory virus activity remains elevated nationally, with several pathogens continuing to circulate at moderate to high levels. Over the past two weeks, overall activity has remained largely stable, with early signs that respiratory season may begin a gradual decline.

Respiratory Trend Report

Week ending March 8th, 2026

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HealthTrackRx
Trend Update

Infection Trends

Influenza A/B positivity at the cusp of a downward trend, stabilized over the past two weeks at 11.1%.
Respiratory Syncytial Virus (RSV) positivity remains elevated at 6.4% with stable to slightly decreasing levels in recent weeks.
Seasonal Coronaviruses (229E, NL63, HKU1, and OC43) remain elevated at 11.2%; however, activity appears to begin a gradual downward trend.
Rhinovirus/Enterovirus continues to be the most frequently detected pathogen at 15.7%, with stable to slightly increasing positivity in recent weeks.
Human Metapneumovirus (hMPV) continues to trend upward, increasing to 5.2%, representing the most notable growth among circulating pathogens.
Adenovirus, Parainfluenza Viruses (Types 1–4), COVID-19 (SARS-CoV-2), Enterovirus D68 all remain stable at levels below 2%.

Infection Trends

Influenza A/B positivity at the cusp of a downward trend, stabilized over the past two weeks at 11.1%.
Respiratory Syncytial Virus (RSV) positivity remains elevated at 6.4% with stable to slightly decreasing levels in recent weeks.
Seasonal Coronaviruses (229E, NL63, HKU1, and OC43) remain elevated at 11.2%; however, activity appears to begin a gradual downward trend.
Rhinovirus/Enterovirus continues to be the most frequently detected pathogen at 15.7%, with stable to slightly increasing positivity in recent weeks.
Human Metapneumovirus (hMPV) continues to trend upward, increasing to 5.2%, representing the most notable growth among circulating pathogens.
Adenovirus, Parainfluenza Viruses (Types 1–4), COVID-19 (SARS-CoV-2), Enterovirus D68 all remain stable at levels below 2%.

Seasonal Outlook

Influenza A/B, RSV, & Seasonal coronaviruses are expected to gradually decline through March.
Human metapneumovirus is expected to continue increasing into early spring.
Rhinovirus/Enterovirus will likely persist at baseline levels with potential spring increases.

Seasonal Outlook

Influenza A/B, RSV, & Seasonal coronaviruses are expected to gradually decline through March.
Human metapneumovirus is expected to continue increasing into early spring.
Rhinovirus/Enterovirus will likely persist at baseline levels with potential spring increases.

Trending Up

Human Metapneumovirus

Trending Down

Influenza A/B
Seasonal Coronavirus (229E, NL63, OC43, HKU1)

Remaining Level

Respiratory Syncytial Virus (RSV)
Rhinovirus/Enterovirus
COVID-19 Coronavirus (SARS-CoV-2)
Adenovirus
Parainfluenza Virus (Types 1–4)
Enterovirus D68

Trending Up

Human Metapneumovirus

Trending Down

Influenza A/B
Seasonal Coronavirus (229E, NL63, OC43, HKU1)

Remaining Level

Respiratory Syncytial Virus (RSV)
Rhinovirus/Enterovirus
COVID-19 Coronavirus (SARS-CoV-2)
Adenovirus
Parainfluenza Virus (Types 1–4)
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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