Humans with double allelic loss of CCR5 are virtually immune to HIV acquired via the sexual route (though can be infected by IV transmission of CXCR4 tropic viruses).
É interesante que as persoas coa perda dos dous alelos do CCR5 son virtualmente inmunes ao VIH adquirido por vía sexual (pero poden infectarse pola transmisión de VIH trópicos do outro receptor CXCR4).