The NHS is calling for people to come forward and donate blood as supplies have fallen to critically low levels in England.
The low blood stocks have caused the NHS to declare an amber alert status for the first time ever.
The NHS usually aims to hold at least six days of blood in stock, but NHS Blood and Transplant (NHSBT) has said that stocks have now fallen to just three days worth, with levels of O-type blood dropping to below two days.
