The Infectious risk has shown a gradual increase over the past 12 weeks, ending the period at its highest level..
Allergy risk activity has remained stable over the past 12 weeks in Harrison, Ohio.
Pollution risk activity has been trending downward over the past 12 weeks in Harrison, Ohio.
Weather risk activity has remained stable over the past 12 weeks in Harrison, Ohio.
Last updated: August 24, 2026
Data refreshed weekly