Years ago I was a volunteer with an HIV/Aids service. As well as running a helpline I was a "buddy", which meant befriending someone affected by HIV. It involved everything from helping a man with Aids with home care, to working with a young mum whose partner had recently died. When I first met her she was skeletal, still grieving and struggling to cope. This was compounded by a nightmare story. When she had become pregnant three years earlier and went to the doctor for a check up she saw the letters HIV written at...