The survey conducted by Gates Open Research 2023 covered 34 counties out of 47.
Of the 167,940 Female Sex Workers (FSWs) estimated in all 34 counties, nearly one-fourth were found in Nairobi (24 per cent).
It was followed by Nakuru (11 per cent) and Mombasa (5 per cent).
More than 90 per cent of the FSWs were found to concentrate in 24 counties.