Is it flu season yet?
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How active is flu right now?
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Helpful right now
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I Should I Test Right Now?
II Is It Too Late to Vaccinate?
III How Does This Season Compare?
IV The Season So Far
weekly flu activity — full season
Very Low
Low
Moderate
High
Very High
color reflects activity level — taller = more severe
V By Region
HHS regions — this week
CDC ILINet surveillance data. Updated weekly, typically Thursday.
VI Essentials
if flu is active near you
Test Kit
Test early — antivirals work best in the first 48 hours
Prevention
Hand sanitizer — 60%+ alcohol stops surface spread
Air & Home
40–60% humidity reduces airborne viability
Monitoring
Track fever — seek care above 103°F or after 3 days
Coming Soon
Flu alerts for your region
Know when flu activity spikes to High in your HHS region, when the season peaks, and when you're finally in the clear.
Not active yet — we're building it. No data is collected.