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Thousands of ‘missing’ blood donors across the North East are being urgently called on as the NHS warns that supplies of O ...

THOUSANDS of ‘missing’ blood donors across London are being urgently called on as the NHS warns that supplies of O negative are critically low.

The NHS has warned that supplies of O negative blood in the West Midlands are "critically low", as it urges people to donate.

Vitalant's Linda Grace said there is a particular need for O negative blood.