Feb. 11 (Bloomberg) -- New York City doctors have discovered a previously unseen strain of HIV, which appears to be resistant to three of the four types of anti-viral drugs that combat the disease, and progresses from infection to full-blown AIDS in two or three months, the health department said.
``We've identified this strain of HIV that is difficult or impossible to treat and which appears to progress rapidly to AIDS,'' said New York City Health Commissioner Thomas Frieden.
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