A Patient with HIV-1 Superinfection

Abstract
The detection of an increasing number of circulating recombinant strains of human immunodeficiency virus type 1 (HIV-1) indicates that genetic recombination can occur in cells infected with two strains of HIV-1.1,2 Coinfection with two circulating strains of HIV-1 has been detected in a few subjects in communities where HIV-1 infection is endemic.3 Coinfection may result from exposure to a second virus either shortly after the initial infection or during the course of established HIV-1 infection; the latter circumstance is called superinfection.