NHS appeals for blood donors after London cyber-attack

Due to a ransomware attack on London hospitals, an appeal for O blood-type donors across the UK has been launched. The affected hospitals can’t match patients’ blood as often as usual, leading to cancelled operations. The NHS blood dating site implemented a queuing system, while urging O positive and O negative donors to book appointments. O-type blood, particularly O negative, is crucial for emergency procedures when a patient’s blood type is unknown.