What's Going Around in Colorado?

Health surveillance summary for Colorado — April 2026

Here's a snapshot of current respiratory illness and disease activity in Colorado, based on the latest CDC surveillance data. Click any topic for detailed trends, charts, and nearby state comparisons.

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Elevated Activity in Colorado

Flu, RSV, MMR Coverage are at elevated levels. Tap below for details.

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Flu

High

4.7% ILI

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RSV

High

3.9 per 100K

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COVID-19

Moderate

1.1 per 100K

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Measles

Moderate

9 cases in 2026

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MMR Coverage

Very High

88% coverage

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What's Getting Better or Worse?

Based on CDC forecasting data as of 2026-03-31.

Nearby States

Wyoming Nebraska Kansas New Mexico Utah

Cities in Colorado

Health data available for these Colorado cities:

Denver ·Colorado Springs ·Aurora ·Fort Collins ·Lakewood ·Thornton ·Arvada ·Westminster ·Pueblo ·Greeley ·Centennial ·Boulder ·Highlands Ranch ·Longmont

Frequently Asked Questions

What's going around in Colorado right now?

Based on the latest CDC data, here's what's circulating in Colorado: flu activity is high, RSV is high, COVID-19 is moderate, and there have been 9 measles cases reported in 2026. Each topic page has detailed trends and comparisons.

Is the flu bad in Colorado right now?

Flu activity in Colorado is currently high with 4.7% ILI. Visit the Colorado flu page for weekly trend charts, nearby state comparisons, and historical context.

Are there measles cases in Colorado?

Colorado has reported 9 confirmed measles cases in 2026. The state's kindergarten MMR vaccination rate is 88%. See the measles tracker for county-level details.

Local Health Signal is not affiliated with the CDC or any government agency. Data is provided for informational purposes only and is not intended for clinical decision making. See our methods page for details on data sources and limitations.