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Researchers at the 4th International Workshop on HIV Drug Resistance and Treatment Strategies in Sitges, Spain, reported last month that more than one fourth of patients with HIV infection in a new study had viral resistance to all three classes of HIV drugs now on the market.
The study included nearly 12,000 US-based patients who were studied during 1999. Data showed that 27% of the patients had virus that was resistant to all three classes of HIV drugs, 29% had virus resistant to two classes of drugs, and 22% had virus resistant to a single class. That left only 22% who had virus sensitive to all three classes.
Voelker R. HIV Drug Resistance. JAMA. 2000;284(2):169. doi:10.1001/jama.284.2.169