Low Covid-19 risk in Mercer, Illinois.
Low Flu risk in Mercer, Illinois.
Low Rsv risk in Mercer, Illinois.
Low Infectious risk in Mercer, Illinois.
Very high Allergy risk in Mercer, Illinois.
Low Pollution risk in Mercer, Illinois.
Low Weather risk in Mercer, Illinois.
Last updated: April 20, 2026
Data refreshed weekly