The Infectious risk has shown a gradual decrease over the last 12 weeks, bringing current levels down from earlier weeks..
Allergy risk activity has remained stable over the past 12 weeks in Clark, Ohio.
Pollution risk activity has been climbing over the past 12 weeks in Clark, Ohio.
Weather risk activity has been increasing over the past 12 weeks in Clark, Ohio.
Last updated: July 6, 2026
Data refreshed weekly