The NHS warns that the UK needs one million regular blood donors to avoid a 'red alert' shortage, following low blood stocks after a cyberattack on London hospitals. Officials issued an 'amber alert' last year for O negative and O positive blood.

Original article source: https://news.sky.com/story/one-million-blood-donors-needed-to-meet-demand-and-avoid-red-alert-shortage-nhs-warns-13380992
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