In addition, Healthcare Clinics in the Houston market will begin prescribing PrEP for HIV prevention April 25 DEERFIELD, Ill., 2017-Apr-19 — /EPR Retail News/ — Beginning April 25, Walgreens Healthcare Clinic locations in select markets will offer testing services for sexually transmitted infections (STIs), including HIV, Hepatitis B and C, chlamydia, gonorrhea and other conditions. As part…