The 18/28 Percent Rule
Roughly 18 percent of people living with HIV don't know it, and 28 percent of people infected with the virus do not take the proper steps towards treatment.
Consider this – knowing that the return for proper treatment is a long, full life, think of the tragedy that comes from a person infected with HIV that does not seek proper treatment. That's a life lost for each person, or at the very least, a life lived under sub-par conditions.
The CDC is currently doing research into the cause for this lapse, but hypotheses include that people are embarrassed to seek treatment, too busy, have insufficient access to health care, competing priorities or insufficient funds.