The Infectious risk has stayed within a narrow range over the past 12 weeks, showing no notable shift in recent weeks..
Allergy risk activity has been trending upward over the past 12 weeks in Jefferson, Illinois.
No Pollution activity has been reported over the past 12 weeks in Jefferson, Illinois.
Weather risk activity has remained stable over the past 12 weeks in Jefferson, Illinois.
Last updated: August 24, 2026
Data refreshed weekly