In this July 31, 2014, photo, a sex worker waits for costumers in Sao Paulo, Brazil. Even as HIV infection rates have begun declining in many other places, cases have been slowly rising in Brazil _ with the sharpest jump among youths 15 to 24. The national Health Ministry says overall numbers of HIV infections has reached nearly 800,000. That’s half of all the HIV cases in all of Latin America. (AP Photo/Andre Penner)SAO PAULO (AP) — The devastating information did not make feel to Brazilian Pierre Freitaz. How used to be it imaginable that, at age 17, he was once contaminated with HIV if his simplest boyfriend appeared fit and wholesome?