Cook County Department of Public Health

Opioids are a family of drugs related to opium, including heroin, fentanyl, morphine, codeine, and others...

Syphilis is a sexually transmitted disease (STD) that can have very serious complications when left untreated...

West Nile virus is a serious disease most commonly spread by infected mosquitoes. Mosquitoes become infected...

CDC has issued a travel alert for people, especially women who are pregnant or planning to become pregnant...