Artificial photoreceptors integrated into retina after being transplanted into blind mice

Sell-off puts blood supply at risk, warns Lord Owen

27-year-old Rochelle Harris had just returned from a holiday in Peru

The patient, believed to be 49, was being treated for acute respiratory syndrome and kidney failure

The American business executive who had been held hostage by workers at his company’s Beijing factory has arrived back in the US after being freed in return for what he claims was a ransom of around half a million dollars.

Four teenagers have been arrested over a fire at an Islamic School which saw 182 staff and pupils evacuated and two treated for smoke inhalation.

The Metropolitan Police Commissioner has made an impassioned plea for unity after a fire in an Islamic boarding school in south-east London three days after a fire at a community centre in Muswell Hill, north London.

The Independent spoke via Skype to activists and rebel fighters inside the city yesterday afternoon, during a brief lull in fighting. They  described a scene of devastation: flattened buildings, hospitals low on medical supplies and civilians trapped between the fighting with no escape route.

Rifaie Tammas, 24, is an activist and supporter of the Free Syrian Army. Before the start of the civil war he was an English teacher and he has lived in Qusayr all his life.

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Therapy involves extracting patient's white blood cells that are mixed with proteins and re-infused

Eurostar has appointed its first female chairman, with Clare Hollingsworth set to take over from the incumbent Richard Brown in June. Ms Hollingsworth was chief executive of the private hospital group Spire Healthcare, and managing director of Caledonian Airways.

A 15-year-old US high school student whose uncle died of pancreatic cancer has developed the first test for the disease that could detect tumours before they become too advanced to treat.

Twenty-five workers from a German factory reportedly been sent to hospital after eating sandwiches laced with rat poison.

A new strain of norovirus has been responsible for the majority of recent cases of the winter vomiting bug, health experts said.

Around 100,000 people were struck down with the winter vomiting bug over Christmas – a rise of 72 per cent on the year before.