Sexually transmitted infections in the pornography industry deals with the occupational safety and health issue in the sex industry of transmission of sexually transmitted infections/diseases (STIs/STDs), especially HIV/AIDS, which became a major cause of concern since the 1980s, especially for pornographic film actors. From 2004 to 2009, 22 HIV cases in the U.S. pornography industry were reported; roughly half were among men who work in gay films, and the other half were men and women working in heterosexual productions.