Group houses are becoming popular — again — among some single baby boomers, and not just for financial reasons. Marianne Kilkenny (second from right) shares her home in Asheville, N.C, with four other people. Mike Belleme/The New York Times hide caption

itoggle caption Mike Belleme/The New York Times

Hospitals began testing blood for hepatitis in 1992, so anyone who received a blood transfusion before then is at an increased risk for contracting the disease. iStockphoto hide caption

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Gregg Allman and Natalie Cole perform at the Tune In to Hep C benefit concert at the Beacon Theatre in New York on July 27, 2011. Both singers have battled chronic hepatitis C. Rob Bennett/AP Images for TuneInToHepC.com hide caption

itoggle caption Rob Bennett/AP Images for TuneInToHepC.com

Dr. Paul J. Pockros, a liver specialist at Scripps Green Hospital in San Diego, talks with hepatitis C patient Loretta Roberts in Jan. 2011. Lenny Ignelzi/AP hide caption

itoggle caption Lenny Ignelzi/AP