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Photographer Jennifer Warren documents the fight against HIV and Aids in Delhi's slums, red light district and drug havens. Areas like this one in Seemapuri are festering communities where disease, hunger and poverty are widespread and HIV is common.

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Infected by her husband, who is now dead, Puna Ma is dying of full-blown Aids and complications with tuberculosis. The path of HIV in India most frequently follows promiscuous husbands into their homes, infecting entire families.

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Staff complete a routine catheterisation for an ailing HIV positive patient at Michael's Care Home in Delhi.

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Patients at Michael's Care Home run their own daily yoga classes to focus their spirituality and boost morale.

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At a home for HIV positive orphans, the children's status must remain unknown to the surrounding community. Only their carers and school principal know the children are infected with the virus.

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Project Concern International organises a mobile medical van to treat patients in slums twice a week.

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A check-up for a sexually transmitted disease begins with one-on-one counselling and questioning of the patient's sexual habits.

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There are 96 brothels in Delhi's Red-Light District, housing between 3,000 to 4,000 women. Eighty percent of these sex workers are between the ages of 14 and 27.

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India's sex workers have no rights to health care. Here their children, who are not allowed to attend government schools, are taught informally by community educators in an outdoor setting.

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Intravenous drug users in the Red Fort commercial area of Delhi take a break from their high. Almost 50% of people there and in the Yamuna Bazaar area are intravenous drug users. Eighty-five percent are HIV positive.

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An HIV negative man faces the camera while an HIV positive patient chooses to remain anonymous. Discrimination against people infected with HIV is rampant in India.