The pictures were taken by photographer Ton Koeneon in a Lagos slum named Badia.
There are currently an estimated 1.2million people in Lagos, Nigeria’s largest city, living with HIV.
He said his driver had quipped: ‘If you arrive by car, you can smell the HIV virus outside.’
In Badia, sex workers as young as 14, trying to earn money to survive, entertain around five clients a day.
Last year a study by the Iranian Journal of Public Health noted that the country has a 4.1 per cent HIV/AIDS prevalence rate in adults.
Thanks to investment and education, the study found, the rate had fallen from five per cent in the early 2000s, but it said there is still some way to go.
Three years ago, research by the Journal of the International AIDS Society found the prevalence among sex workers in Nigeria was 24.3 per cent.
Last year’s study said women often found they could not ask their husbands or boyfriends to wear condoms, and were not expected to carry them.
One respondent, a 28-year-old marketing executive, said: ‘The problem is that you cannot even suggest the use of that thing to your boyfriend.

