Abstract

Human immunodeficiency virus 1 (HIV-1) dual infections are considered important because they have been related to AIDS progression. We identified dual infections in 2 patients with long-term, nonprogressive HIV-1 disease; the first patient was diagnosed as being already coinfected, on the basis of the first sample analyzed, but a previous superinfection could not be excluded; the second patient was diagnosed as having a superinfection, on the basis of the 9-year difference between the viral dating of the 2 strains. Dual infections occur in patients with long-term, nonprogressive disease, with no immediate clinical manifestations. Such occurrences could indicate a general phenomenon in natural HIV-1 infections.

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