LA County Department of Public Health Advisory Detection and Prevention of Hepatitis A among Homeless and People who use Illicit Drugs 2017-07-31 July 31, 2017August 30, 2018 Health Advisories LA-County-Department-of-Public-Health-Advisory-Detection-and-Prevention-of-Hepatitis-A-among-Homeless-and-People-who-use-Illicit-Drugs-2017-07-31