The US city of Philadelphia introduces a tax on carbonated sugary drinks, despite a multimillion-dollar campaign by the beverage industry to block it.

A pioneering pair of cancer drugs that unleash the immune system on tumours will be paid for by the NHS in England.

Intensive physical exercise four hours after learning is the key to remembering information learnt, say Dutch researchers.

UN health experts recommend cutting the standard dose of yellow fever vaccine by 80% in emergencies, amid an outbreak in Angola and DR Congo.