30 Day Historic Cold & Flu Levels

for San Francisco, CA

National
Cold & Flu Map

Click map to zoom in and explore regions, states and cities

Check flu levels in another city

Where is flu active today?

best cities

worst cities

Compare cold & flu levels in another city

Cold & Flu News

Measles Cases Set 35-Year US Record With Months To Go In 2026

Sepsis, Lung Infection Patients See No Benefit From Remote Monitoring

Health 'War Room,' Digital Tools Are Tracking Disease Risks During World Cup

Getting The RSV Shot While Pregnant Could Protect Your Baby After Birth

Childhood Flu Shots Prevent Millions of Cases, Study Finds

Long COVID Might Be Twice As Common As Previously Thought

More News