The document discusses at-home STD testing for men who have sex with men. It notes that 76% of 2010 HIV infections in San Francisco were among gay men, and the CDC recommends testing every 3-6 months for this group. However, on average, men only test every 18 months. The solution proposed is a subscription-based, at-home delivery service for STD tests, as interviews with potential customers found they wanted privacy and comfort of testing at home, similar to a dentist checkup. The total addressable market for this group is estimated at $1.1 billion.