What's Going Around in California?
See the strongest statewide signal first, then open the next page that answers the real question.
Fast answer
What matters first in California
Flu is moderate in California right now and similar to 2.9% last week, RSV is low and similar to 1.3 per 100k last week, COVID-19 is low and similar to 0.6 per 100k last week, and California has reported 24 measles cases in 2026.
Measles is the main signal worth checking first.
Strongest current signal
Measles
24 cases in 2026
Spread signal
Statewide disease surveillance
Refresh
Weekly for respiratory topics
Best use
Fast statewide answer before deeper detail
Flu
Moderate2.7% ILI
→ Stable — similar to 2.9% last week
View details →RSV
Low1.0 per 100K
→ Stable — similar to 1.3 per 100K last week
View details →COVID-19
Low0.5 per 100K
→ Stable — similar to 0.6 per 100K last week
View details →Measles
High24 cases in 2026
Use case count plus vaccination context together.
View details →MMR Coverage
Low96.1% coverage
Long-run prevention signal, not a weekly spread metric.
View details →Sendable statewide snapshot
What's going around in California right now
ModerateBuilt to be the one page you can forward to family, schools, travelers, or coworkers who need the fast statewide answer.
If you need one link to send about California, this is the right statewide snapshot. It gives the fast answer first, then routes into the deeper topic pages people usually need next.
- Flu: 2.7% ILI
- RSV: 1.0 per 100K
- Measles: 24 cases in 2026
Useful questions
Questions worth opening from the California overview
These pages help when the statewide snapshot is useful but you need one more layer of interpretation, sharing guidance, or measles context before sending someone deeper.
Sharing Question
What Page Should I Send Someone Who Asks What’s Going Around?
A utility page for sharing the right LHS link the first time instead of sending a random dashboard or article.
Measles Interpretation
Should I Worry About a Single Measles Case in My State?
A trust-preserving measles interpretation page that helps users react proportionately and click into the right state page next.
ARI Question
What Does High Respiratory Activity Mean?
A simple explanation of the ARI signal, built to route people into the right next disease page instead of leaving them with an abstract label.
What's Getting Better or Worse?
Based on CDC forecasting data as of 2026-03-31.
Source and context
Where this statewide view comes from
Updated
May 29, 2026
Coverage
Statewide surveillance across flu, RSV, COVID-19, measles, and MMR
Best For
Fast statewide snapshot before drilling into a topic page
This overview combines multiple public-health feeds for California. It is best for getting the quickest cross-topic picture, while the disease-specific pages provide deeper charts, methodology, and comparisons.
Useful local shortcuts
Pages to open next in California
If the statewide overview is not enough, these California pages give you a faster path into the local or illness-specific answer.
Nearby States
Cities in California
Health data available for these California cities:
Frequently Asked Questions
What's going around in California right now?
Here is the fast statewide read for California: flu activity is moderate, RSV is low, COVID-19 is low, and California has reported 24 measles cases in 2026. Each topic page goes deeper when you need the detail.
Is the flu bad in California right now?
Flu activity in California is currently moderate with 2.7% ILI. Visit the California flu page for weekly trend charts, nearby state comparisons, and historical context.
Are there measles cases in California?
California has reported 24 measles cases in 2026. The state's kindergarten MMR vaccination rate is 96.1%. See the measles tracker for county-level details and local-health-department guidance if you need outbreak-specific information.
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.