Respiratory Illnesses Data Channel

This site is updated on Fridays. New data will be added throughout the fall.

What to know

  • As of December 13, 2024, the amount of acute respiratory illness causing people to seek healthcare is moderate nationally.
  • COVID-19 activity is beginning to increase from low levels in some areas of the nation.
  • Seasonal influenza activity continues to increase across the country.
  • RSV activity is moderate and continues to increase in most areas of the United States, particularly in young children.
Respiratory illness causing people to seek healthcare is moderate.

Your community snapshot

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Select your state / territory and your county to receive information on COVID-19, flu, and RSV in your community

The CDC may not have data for all states, counties, or territories. Read more »

Overall respiratory illness activity

What it is: A measure of how frequently a wide variety of respiratory symptoms and conditions are diagnosed by emergency department doctors, ranging from the common cold to COVID-19, flu, and RSV.

Why it matters: Summarizes the total impact of respiratory illnesses, regardless of which diseases are causing people to get sick.

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* Overall respiratory illness activity is displayed at the state or territory level, local data is unavailable at this time.

Wastewater viral activity level
COVID-19
Flu†
RSV

What it is: A measure of how much virus is present in sewage.

Why it matters: People who are infected often shed virus into wastewater, even if they don’t have symptoms. As a result, high wastewater levels may indicate an increased level of infections even when other measures remain low.

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* Wastewater data is displayed at the state or territory level, local data is unavailable at this time.

† Flu levels are for Influenza A only, which includes avian influenza A(H5). Wastewater data can not determine the source of viruses (from humans, animals, or animal products).

Emergency department visits
COVID-19
Flu
RSV

What it is: A measure of how many people are seeking medical care in emergency departments.

Why it matters: When levels are high, it may indicate that infections are making people sick enough to require treatment.

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* Emergency department data may cover an entire state or Health Service Area. Each Health Service Area includes one or more counties.

* Data is displayed at the state or territory level.

Weekly national summary

Season Outlook

October Update: CDC expects the fall and winter virus season will likely have a similar or lower peak number of combined hospitalizations from COVID-19, influenza, and RSV compared to last year. However, peak hospitalizations from all respiratory viruses remain likely to be much higher than they were before the emergence of COVID-19. Read the entire 2024-2025 Respiratory Season Outlook -October Update (10/18/2024).

CDC updates this outlook every two months during the fall and winter virus season and sooner if there are big changes in how COVID-19, flu, or RSV are spreading.

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Explore related data

Anticipated trends for COVID-19 infections, based on modeling, are displayed at the national and state levels.

Wastewater (sewage) data specific to SARS-CoV-2, the virus that causes COVID-19, are displayed at the national, regional, and state levels. These data can provide an early signal of changes in infection levels.