<unk>  (also called HIV reinfection or SuperAIDS) is a condition in which a person with an established human immunodeficiency virus infection acquires a second strain of HIV, often of a different subtype. These can form a recombinant strain that co-exists with the strain from the initial infection, as well from reinfection with a new virus strain, and may cause more rapid disease progression or carry multiple resistances to certain HIV medications.<unk>  may be interclade, where the second infecting virus is phylogenetically distinct from the initial virus, or intraclade, where the two strains are monophyletic. People with HIV risk<unk>  by the same actions that would place a non-infected person at risk of acquiring HIV. These include sharing needles and forgoing condoms with HIV-positive sexual partners. Cases have been reported globally and studies have shown the incidence rate to be 0–7.7% per year. Research from Uganda published in 2012 indicates that<unk>  among HIV-infected individuals within a general population remains unknown. Further research from The Journal of Infectious Diseases indicates that there have been 16 documented cases of<unk>  since 2002. If a person is infected with a second virus before seroconversion to the first virus has taken place, it is termed a dual infection. Infection with a second strain after seroconversion is known as<unk> .
HIV superinfection
Hepatitis C and HIV coinfection
Epstein–Barr virus infection
Tuberculosis in relation to HIV
HIV/AIDS
Nipah virus infection
HIV-tainted blood scandal 
Risk factors for tuberculosis