MEDICAL UNIVERSITY OF SOUTH CAROLINA IMAGE: WEI JIANG, M.D., IMMUNOLOGIST AND ASSOCIATE PROFESSOR IN THE DEPARTMENT OF MICROBIOLOGY AND IMMUNOLOGY AT THE MEDICAL UNIVERSITY OF SOUTH CAROLINA. CREDIT: SARAH PACK, MEDICAL UNIVERSITY OF SOUTH CAROLINA More and more states are legalizing marijuana, but little is known about how long-term cannabis use affects the microbes in...