How does AZT (azidothymidine) find the HIV genetic code?

Question

AZT works by reverse transcriptase inhibitor (RTI), and it is said to have a 300 to 500-fold greater affinity towards a cell with HIV. If AZT is a relativly small molecule, how does it have this much greater affinity towards the cells with HIV?

Answer 1

being viral, hiv uses reverse transcriptase to replicate, normal cells dont.