New class of zidovudine-resistant HIV identified.

Reports that researchers in the United States have discovered a class of wildtype HIV-1 that has the potential to become resistant to zidovudine. Identification of a group of viruses while screening for mutations associated with drug-resistance in a number of treatment-naive patients who had been diagnosed with HIV-1; How the mutations increase the ability of the virus to give rise to a zidovudine-resistant strain.