Social workers say the campaign to educate prostitutes and their customers against the dangers of AIDS has done nothing to stop the spread of infection. Although the volume of business in Bombay's red-light areas is lower than it was five years ago, many customers refuse to use a condom. Many are willing to pay extra for sex without a condom. With prostitutes earning as little as 50 rupees (HK$11) per client, they can rarely afford to turn away customers who insist on unsafe sex. The Indian Health Organisation has appointed 'sahelis', or friends, from among prostitutes to educate colleagues about AIDS. It has also spearheaded a poster campaign and street plays to spread the message of safer sex. Sometimes it provides medical care for sick sex workers.