The United States, under pressure from its giant pharmaceutical companies, is trying to undermine the use in poor countries of cheap, copycat Aids drugs, made by “pirate'', generic companies but validated by the World Health Organisation (WHO), campaigners claim. US drug companies want the money promised for President George W Bush's Aids plan to be spent on their products.

Medical Research Council says method could help UK's health service tackle obesity.

The true scale of ignorance and lack of sympathy in the United Kingdom to people living with HIV and Aids has been revealed in a survey of British attitudes, released last Wednesday. It suggests the stigma endured by those with the disease in Britain is as serious an issue as it is at the heart of the pandemic in Africa or Asia.

The prohibitive cost of cancer medicines and their lack of efficacy means early intervention is more important than ever.

We don't know what causes it or how to treat it, but 250 000 people in the UK suffer from ME (myalgic encephalopathy).

Scientists have called for measures to prevent the circulation of counterfeit and substandard malaria medicines that threaten millions of lives.

Americans may be rich, but they're fat, sick and dying young, according to an official report, writes Sarah Boseley.

Extensive research on children is ringing alarm bells about allergies.