AIDS: Acquire immune deficiency syndrome HIV: Human immunodeficiency virus CD4+: T helper cells CCR5: Chemokine (C-C motif) receptor 5 CDC: Centers for Disease Control and Prevention WHO: World Health Organization PCP: Pneumocystis pneumonia TB: Tuberculosis MTCT: Mother-to-child transmission HAART: Highly active antiretroviral therapy STI/STD: Sexually transmitted infection/disease