There's a new push to make testing for the AIDS virus as common as cholesterol checks.Americans ages 15 to 64 should get an HIV test at least once — not just people considered at high risk for the virus, an independent panel that sets screening guidelines proposed Monday.The draft guidelines from the U.S. Preventive Services Task Force are the latest recommendations that aim to make HIV screening simply a routine part of a check-up, something a doctor can order with as little fuss as a cholesterol test or a mammogram.