For Rick, his diagnosis of prostate cancer didn't hit him until he realized he would have to tell his kids. Rick had been enjoying his retirement in Sarasota, Florida, when he started having severe leg pain. After initial testing forced him to investigate further, he learned he had prostate cancer, the second-most common cancer in men in the U.S., according to the American Cancer Society. But during his treatment, Rick not only kept a positive attitude - he found a way to give back that became his new purpose in life. Later, we meet David, who was born in South Korea but raised by his adoptive parents in Ann Arbor, Michigan, where he enjoyed a happy childhood. But when he turned 13, he received some devastating news: He had a serious medical condition called hepatitis B. According to the World Health Organization, it's a viral affection that can attack the liver. Although he didn't have any symptoms, David struggled with his condition at first, becoming withdrawn at school and refusing to commit to proper treatment. But as he shares with Medical Stories, David's family inspired him to not lose hope and even become an advocate for those dealing with the same disease. This episode also features in-depth commentary from renowned experts Kosj Yamoah, MD, PhD, Chair, Department of Radiation Oncology, Moffitt Cancer Center, and Nancy Reau, MD, Section Chief of Hepatology, Rush University Medical Center, Chicago.