Migration between the United States and Central and South America is probably affecting the spread of HIV/AIDS and the statistics on HIV/AIDS in a variety of ways.  For example, it is possible that Latino AIDS deaths are understated in U.S. statistics because some migrants, after becoming HIV infected in the United States, return home to be cared for by relatives.  

It is also possible that some men, migrating to the United States in search of work and isolated from their families, start injecting drugs. Then, because of the absence of clean needles, they become infected with HIV and ultimately carry the HIV/AIDS epidemic back home.