Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Exposure-response curve for association between two day moving average of PM2.5 (fine particulate matter) concentrations and hospital admissions and emergency department visits for natural causes, cardiovascular disease, and respiratory disease. The reference point on the curve is the counterfactual concentration at 0 μg/m3 of the two day moving average PM2.5 during the study period
