ADA and infection: Importantly, at the time of analysis (21 d after infection), 80%–90% of the cells infected with ADA and Yu-2 viruses were p24+ (only 20% of the cells infected with 92US660 strain were p24+ at that time), indicating that reverse transcription (RT) values in these infections reflected the amount of virus produced per cell and that cholesterol efflux impairment depended on the level of virus protein expression.