There are, at present, twenty-two anti-HIV drugs that have been formally licensed for clinical use in the treatment of HIV infections (AIDS): zidovudine, didanosine, zalcitabine, stavudine, lamivudine, abacavir, emtricitabine, tenofovir, nevirapine, delavirdine, efavirenz, saquinavir, ritonavir, indinavir, nelfinavir, amprenavir, lopinavir, atazanavir. Only 64% of the people living with HIV/AIDs in Africa are able to access antiretroviral treatment. A large part of the problem is the people who are not yet diagnosed and don't know to access the medication treatments.