Shumaila a prostitute of Karachi's Napier Road red-light district, had never heard about HIV and AIDS until recently. She now has been educated to carry condoms, but finds very few users.
"None of us were aware about the danger of AIDS looming over us for years, but now we all know and can avoid it," said the tall 29-year-old who lives in a Victorian-style building in the heart of the neighbourhood.
Shumaila's awareness, rare among Pakistan sex workers, is thanks to the Gender and Reproductive Health Forum, a local charity that runs a UN-funded programme in Napier Road teaching prostitutes about the perils of HIV/AIDS.
"So far we have provided hundreds of thousands of condoms to sex workers in the last two years, which have saved them from being infected with the lethal virus," said Mirza Aleem Baig, who runs the forum.
Karachi, Pakistan's largest metropolis and one of the biggest Muslim cities in the world, has up to 100,000 female sex workers, according to data gathered by Pakistan Society, a local welfare organisation.
"This is 20 percent of their overall population in Pakistan. Lahore comes next with 75,000 sex workers," Saleem Azam, head of the charity, told AFP.
Prostitution may be illegal, but it has prospered in an increasingly Islamised Pakistan, where an economic downturn and widening poverty have forced women and men, onto the streets to meet the rising cost of living.