Each year, 1.7 million people globally are newly infected with HIV — more than 38,000 in the United States alone. This year, President Trump announced a 10-year initiative aimed at reducing new HIV infections in the US, and ultimately ending an epidemic that has plagued this country, and the world, since HIV first emerged in the early 1980s. A key part of that plan is pre-exposure prophylaxis or PrEP, a daily medication to help prevent HIV that is recommended for people at high risk. Recently, the FDA approved a new formulation of PrEP for many — but not all — of those at risk.
PrEP is a daily pill taken to lower a person’s risk for getting HIV. It works best as part of a program of preventive services that includes regular HIV testing. Global research during the past decade shows that a combination of two antiretroviral medicines is more than 90% effective at preventing HIV. These…