Pre–existence and emergence of drug resistance in HIV–1 infection

Abstract excerpt

Antiviral treatment of HIV-1 infection often fails because of the rapid emergence of resistant virus within weeks of the start of therapy. This raises the question of whether resistant viruses pre-exist in drug-naive patients or whether it is produced after the start of therapy. Here we compare the likelihood of pre-existence with the likelihood of production of resistant virus during therapy. We show that...

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