STD Test; Age: 20, 30, 40, and 50 +
Get tested annually for HIV, Chlamydia, and Gonorrhea when you become sexually active.(Photo by China Photos/Getty Images)
SHANGHAI, CHINA - DECEMBER 6: (CHINA OUT) A worker performs a CD4 HIV test at a lab of Shanghai Xuhui District Central Hospital on December 6, 2006 in Shanghai, China. Shanghai's medical researchers have made breakthrough progress in the development of CD4 test reagent, which can largely lower the expense of CD4 tests. The technique is expected to be popularized in needy regions with poor mecical conditions. CD4 test is a blood test that measures the number of disease-fighting CD4 cells in the human's blood, an indicator of the overall health and how HIV is progressing, according to local media.