Weekly state update
Compare the latest reported weeks for California. Dates belong to each source, and the weekly measurements describe statewide activity rather than city case counts.
Latest reports in one screen
Built for repeat checks and easy sharing without making you reopen every statewide page.
California statewide surveillance: Flu-like illness is moderate; COVID-19 is moderate in the latest reported data. Each reading below has its own source week; reports lag infections.
Quick read
Compare each signal with its preceding reported week. Measles totals and vaccination coverage are separate context.
Open California overviewSignal-by-signal
Use this page for the fast weekly change log, then open the deeper page only when needed.
Flu-like illness
Week ending Oct 10, 2026
No comparable report for the preceding week; weekly change unavailable.
Visits for flu-like symptoms, which can be caused by several viruses. Not confirmed flu cases. Weekly reports lag infections.
Source: CDC FluView via Delphi Epidata API
Open the flu-like illness page →COVID-19
Week ending Oct 10, 2026
Down 0.5 admissions per 100,000 since week ending Oct 3, 2026.
People admitted to hospital with this virus. Does not count every infection. Weekly reports lag infections.
Source: CDC NHSN Hospital Respiratory Data
Open the covid-19 page →RSV
Week ending Oct 10, 2026
Unchanged at published precision since week ending Oct 3, 2026.
People admitted to hospital with this virus. Does not count every infection. Weekly reports lag infections.
Source: CDC NHSN Hospital Respiratory Data
Open the rsv page →Measles
Latest source report: Oct 8, 2026
Cumulative context; not new cases this week.
The JHU tracker assigns cases to an approximate year for California. These totals do not establish current weekly spread or a week-to-week change. See the state measles report for official-source context.
Source: JHU Measles Tracking Team via CSSEGISandData/measles_data
Open the measles page →Next clicks
Best next click if you want the whole statewide picture, not just the change log.
See the latest reported readings for home, family, and travel locations together.
Best next click if this week’s update is really about a trip, event, or family visit.
Best next click if you want the national version first and then your place-specific page.
Useful questions
These pages work well when the change log is useful but you need one more layer of interpretation or sharing guidance before you leave the weekly update flow.
Sharing Question
A practical page for sharing the right Local Health Signal link the first time.
Measles Interpretation
A trust-preserving measles interpretation page that helps users react proportionately and click into the right state page next.
ARI Question
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.
Major cities
Open the city overview, then jump into flu, RSV, or measles if those are the real questions.
Open the city overview, then jump into flu, RSV, or measles if those are the real questions.
Open the city overview, then jump into flu, RSV, or measles if those are the real questions.
Open the city overview, then jump into flu, RSV, or measles if those are the real questions.
This week nationally
Flu-like illness: moderate; COVID-19 hospital admissions: moderate; RSV hospital admissions: low. See the source weeks and find your state or city report.
Flu-like illness
2.1% · moderate
COVID-19
1.1 per 100K · moderate
RSV
0.2 per 100K · low
FAQ
California statewide surveillance: Flu-like illness is moderate; COVID-19 is moderate in the latest reported data. Each reading below has its own source week; reports lag infections.
Start with the California overview for the statewide picture, then open the topic report that answers your question. The measurements describe different things and are not ranked as personal risk.
No. This page is a fast statewide change log built from public surveillance data. It is best for quick orientation and sharing, not for clinical decision-making.
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.
Source and context
Updated
Oct 17, 2026 (latest dataset refresh; see each reading’s date)
Coverage
California statewide respiratory changes, with separate cumulative measles and annual MMR context
Best For
Fast weekly change checks, repeat visits, and forwarding one state update
A dataset refresh does not make all readings current. Weekly comparisons require consecutive observation weeks. Approximate measles year totals and annual vaccination coverage do not measure this week’s spread.