The Infectious risk has shown little change over the last 12 weeks, showing no notable shift in recent weeks..
Allergy risk activity has stayed relatively flat over the past 12 weeks in Harrison, Ohio.
Pollution risk activity has been increasing over the past 12 weeks in Harrison, Ohio.
Weather risk activity has been increasing over the past 12 weeks in Harrison, Ohio.
Last updated: July 6, 2026
Data refreshed weekly