Human immunodeficiency virus type 1 ( HIV-1 ) has infected more than 40 million people worldwide , mainly in sub - Saharan Africa .
HIV-1 Pr55Gag is a promising HIV-1 vaccine candidate :
Human immunodeficiency virus type 1 ( HIV-1 ) has infected more than 40 million people worldwide , mainly in sub - Saharan Africa .
HIV-1 Pr55Gag is a promising HIV-1 vaccine candidate :