Flu-like illness
Moderate3.1%
outpatient visits with flu-like symptoms
Trend unavailable
Week ending Oct 10, 2026
What's Going Around in San Diego?
Latest reported illness readings for San Diego — October 2026
Your weekly respiratory picture
COVID in San Diego: how the signals fit
California COVID-19 hospital admissions: latest week ending Oct 10, 2026; a recent direction is unavailable.
In the monitored San Diego County service area, COVID-19 wastewater activity was high for the week ending Oct 10, 2026; lower than Oct 3, 2026.
Hospital admissions and virus levels in sewage measure different things and cover different populations. They do not establish a single citywide infection trend.
Wastewater covers one monitored service area serving an estimated 2.2 million people, not every San Diego city or county resident. The source does not publish its boundary or identify coverage for an exact address.
California statewide surveillance. These readings are context for San Diego, not city case counts. Weekly reports lag behind infections.
COVID-19
Moderate1.6
hospital admissions per 100,000 people
Trend unavailable
Week ending Oct 10, 2026
RSV
Low0.1
hospital admissions per 100,000 people
Trend unavailable
Week ending Oct 10, 2026
Six reported weeks where available; each chart uses its own scale. Flu-like illness can be caused by several viruses. Hospital admissions do not count every infection. These are not personal risk scores.
A useful update for your group chat
The summary explains both COVID signals and includes their dates, sources, and coverage.
Measles (statewide)
29 cases in the current state tracker view. Approximate California tracker • report through Oct 8, 2026. Not a San Diego case count or formal outbreak status.
Local measles answer →A local signal alongside the statewide report
Wastewater in San Diego County
One monitored service area · estimated population served: 2.2 million. This is not coverage of every city or county resident. The source does not identify an exact address or publish this site's boundary.
COVID-19
High
CDC wastewater activity level: 11.12
Week ending Oct 10, 2026
Lower than week ending Oct 3, 2026.
Influenza A
Very Low
CDC wastewater activity level: 2.25
Week ending Oct 10, 2026
Lower than week ending Oct 3, 2026.
RSV
Very Low
CDC wastewater activity level: 1
Week ending Oct 10, 2026
Lower than week ending Oct 3, 2026.
Wastewater can add context about virus circulation. It measures a different signal from hospital admissions and does not count infections. Categories come from CDC; values for different viruses should not be ranked against each other.
CDC observations and dates ↗How CDC defines these levels ↗County dashboard and other monitoring sites ↗
If your San Diego question is specifically COVID, open the direct COVID answer first. It uses California statewide COVID-19 hospitalization surveillance for the San Diego area and keeps the city-vs-state scope clear.
Open the San Diego COVID answer →Beyond the numbers
What can I do with this?
Weekly readings give context. Your symptoms and a healthcare provider’s advice matter more for personal decisions.
General information for respiratory illnesses, not a diagnosis or personal medical advice. Trouble breathing or chest pain needs emergency medical care. Follow illness-specific guidance for measles and other infections.
Vaccination and other local health context
MeaslesHigh
29 cases in the current state tracker view
MMR CoverageModerate
96.1% in California
Prevention context, not a weekly spread signal.
Local tap water check
Water quality checks for San Diego
Open the official water report, service-line notes, and renter checklist for San Diego. This is separate from what is spreading this week, but it is useful local-health context when you are renting, traveling, or moving.
Useful questions
Questions that make the San Diego page easier to use
Understand what the readings can tell you and when to check another source.
City Page Guide
How Do I Read a City Health Page Fast?
A quick city-page guide for users who want the local answer without getting stuck on charts, source scope, or which link to open next.
Trust Question
Why Does My City Page Use State Data?
A trust page that explains the scope of city pages clearly and routes people into the best city, state, and travel surfaces.
City or State?
Should I Check the City or State Page First?
A practical page that helps you choose the right city, state, or travel page on the first try.
Source and context
Where this city page data comes from
Updated
Latest respiratory week: Oct 10, 2026; measles tracker report through: Oct 8, 2026; local wastewater COVID week: Oct 10, 2026
Coverage
Statewide surveillance, one San Diego County wastewater service area, and older city context
Best For
Quick local infectious-disease orientation before deeper chart review
Use the top half of this page for the latest statewide signals relevant to San Diego, not exact city case counts. The separate local wastewater section measures virus levels in one monitored San Diego County service area; it does not count infections or cover every resident. Public dashboards do not identify every ordinary cold or local cluster. The lower community-context section is older CDC PLACES data about respiratory burden and access to care, included to explain possible impact rather than current spread.
Methods →Data sources →Refresh cadence: Weekly for infectious-disease feeds; annual for CDC PLACES context
Secondary context
Community context that can change impact
This does not tell you what is spreading this week. These older community estimates help explain respiratory vulnerability and access to care in San Diego. They do not describe what is spreading this week. The measures below use CDC PLACES city estimates from 2022.
Respiratory burden
8.9%
Asthma
Higher asthma prevalence can mean more people feel respiratory surges harder.
Chronic lung disease
4.1%
COPD
COPD can raise the stakes when respiratory infections rise, especially for older adults.
Access to care
8.4%
Uninsured
Higher uninsured rates can make prevention, testing, and treatment harder to reach quickly.
Preventive care reach
72.4%
Annual Checkup
Routine checkups make vaccination, follow-up, and early care easier when illness is spreading.
See the full city context dataset14 more measures
Chronic Conditions
9.4%
Diabetes
24.6%
Obesity
6.3%
Cancer
4.6%
Heart Disease
2.6%
Stroke
27.1%
High BP
30.8%
High Cholesterol
Mental Health
20.9%
Depression
16.3%
Poor Mental Health
Health Behaviors
9.6%
Smoking
16.7%
Binge Drinking
20.0%
Inactive
34.8%
Sleep Deprived
Prevention & Access
64.8%
Dental Visit
More Cities in California
Compare this snapshot with other major cities in California.
Frequently Asked Questions
What illnesses are going around in San Diego, California right now?
Flu-like illness is moderate; COVID-19 is moderate in the latest reported data. These are California statewide readings. Public dashboards do not identify every ordinary cold or local cluster. Measles is shown separately as 29 cases in the current state tracker view in the approximate California tracker through Oct 8, 2026; that is not a San Diego case count or formal outbreak status.
Is the flu bad in San Diego right now?
Flu activity in California (which includes San Diego) is currently moderate with 3.1% ILI. The dated CDC Rt direction estimate suggests activity may be increasing. See the California flu page for weekly trend charts.
Is COVID going around San Diego, and why do the signals differ?
California COVID-19 hospital admissions: latest week ending Oct 10, 2026; a recent direction is unavailable. In the monitored San Diego County service area, COVID-19 wastewater activity was high for the week ending Oct 10, 2026; lower than Oct 3, 2026. Hospital admissions and virus levels in sewage measure different things and cover different populations. They do not establish a single citywide infection trend. Wastewater covers one monitored service area serving an estimated 2.2 million people, not every San Diego city or county resident. The source does not publish its boundary or identify coverage for an exact address.
Why does this page include city-level community context?
The lower community-context section does not show what is spreading this week. It uses CDC PLACES (2022 data) to show slower-moving local vulnerability and access-to-care patterns in San Diego, such as asthma burden or uninsured adults, so the infection data has clearer local context.
Does San Diego have its own health data, or is this state-level?
This page combines statewide surveillance, a local wastewater signal, and older community context. Flu, COVID-19 hospital admissions, RSV hospital admissions, and measles use California statewide surveillance as context relevant to San Diego; they are not exact San Diego case counts. The separate CDC wastewater readings cover one monitored service area in San Diego County, not every city or county resident. The lower community-context section adds slower San Diego-specific CDC PLACES estimates about respiratory vulnerability and access to care. Public dashboards can miss ordinary colds and small local clusters, so use local health-department notices for confirmed local events.
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.