
The United Kingdom’s National Health Service (NHS) has issued an urgent appeal to residents of England, calling for one million individuals to donate blood within the current week. The plea arises from dangerously low blood reserves following a major cyberattack that struck in 2024.
According to NHS data, merely 2% of the population sustains the entirety of the national blood donation system. The current crisis risks triggering a “red alert” status, indicating that the demand for blood would far outstrip supply—placing patients’ lives in immediate jeopardy.
The root of the issue lies in a ransomware attack on Synnovis, a diagnostics provider serving London hospitals. The breach incapacitated the ability of medical staff to promptly determine patients’ blood types, forcing hospitals to rely heavily on stocks of universal donor blood—type O. This blood type is suitable for emergency transfusions across all blood groups. However, only 8% of the population possesses O-negative blood, while its clinical usage accounts for 15% of total transfusions. This discrepancy has rapidly depleted reserves and prompted NHS to adopt drastic measures.
The shortage in donor participation, coupled with the overuse of universal blood, has critically undermined the system’s resilience. NHS Blood and Transplant has already transitioned to “amber alert” status, under which transfusions are reserved exclusively for the most critical cases.
Amid the escalating situation, the agency emphasizes the dire need for O-negative blood donors, along with those of African and Caribbean heritage, who are more likely to carry rare antigens vital for treating sickle cell anemia. According to NHS Blood and Transplant, the engagement of one million consistent donors could stabilize supplies, fortify reserves, and mitigate ongoing risks.
Yet the problem extends beyond the immediate shortage. Last year’s Qilin cyberattack on Synnovis led to the leak of confidential patient records online, affecting over 900,000 individuals. Exposed information included names, dates of birth, NHS identification numbers, and in some cases, contact details.
More alarmingly, the breach compromised sensitive medical documents—specifically, pathomorphological and histological reports containing detailed descriptions of symptoms. These may have referenced diagnoses involving cancer or sexually transmitted infections.
Despite public concern, reports indicate that not a single affected individual has yet received formal notification regarding the nature of their personal data exposure. Synnovis claims that an internal audit tied to its eDiscovery process is “nearing completion,” though formal notification procedures have yet to commence.
Company leadership has stated it “shares the concern” and is committed to concluding the investigation. However, no updated information regarding the status of the eDiscovery process was available at the time of publication.
Under British data protection law, organizations are obligated to inform individuals if their rights and freedoms are at high risk—particularly when medical information is compromised. This requirement remains enforceable, even if internal investigations are prolonged.