California

Hubbub tracks 100+ health risks for California, including flu, COVID-19, RSV, allergies, pollution and severe weather. Hub pages provide an overview of the prevalence of these risks. For real-time risks, forecasts and alerts, get the bub app at https://bub.hubbubworld.com.

The health risk hub pages for California are published weekly. Each hub page shows the 4 most recent weekly snapshots — the most recently completed week and the 3 preceding weeks. For real-time risks, forecasts and alerts, get the bub app at https://bub.hubbubworld.com.

Hubbub develops proprietary models on top of geographic, demographic, environmental, surveillance and weather data to produce prevalence scores across the U.S. Prevalence is reported on a five-point scale (Low, Moderate, High, Very High, Extreme) so the scores are interpretable without needing the raw underlying numbers. The full methodology — including the modeling approach, validation against authoritative sources, and known limitations — is documented at https://www.hubbubworld.com/intelligence#methodology. The health risk data on the Hubbub website is for informational purposes only and does not constitute medical advice. Always consult a healthcare professional for personal health decisions.

Current risk levels, forecasts and alerts for California are exclusive to the bub app, available free on iOS, Android, and Apple Watch at https://bub.hubbubworld.com. This web page is the 4-week historical archive of prevalence — the bub app is where today's data and forecasts live.

Yes. Hubbub tracks every metro in California, and publishes weekly historical prevalence data in the hub web pages. Metro pages are linked from this state page. For real-time risks, forecasts and alerts, get the bub app at https://bub.hubbubworld.com.