BBC News Magazine reports on how sex workers in Kenya are using post-exposure prophylaxis (PEP) antiretroviral therapy to lower their risk of HIV infection, instead of using condoms, which they say are too expensive. “There are no definitive figures to show how well PEP works. It’s far better, experts say, to prevent exposure the virus in the first place, by using condoms,” the news service writes. “Instead it would be better for prostitutes to take a type of antiretroviral designed to be taken before exposure to HIV — known as pre-exposure prophylaxis (PrEP),” BBC notes, adding, “There are plans to run a pilot program with sex workers in Kenya to see if it could be practical for them to use PrEP as an extra layer of defense” (Deen, 11/20).