Several London hospitals, including Guy's and St. Thomas' and King's College, are facing significant disruptions following a ransomware attack on Synnovis, a blood test analysis firm. The attack has led to the discarding of thousands of blood samples and the postponement of operations. In response, medical students have been asked to volunteer for 10- to 12-hour shifts to support pathology services. The attack has also impacted blood transfusions, prompting the NHS to appeal for blood donors with specific blood types. The NHS has increased its cybersecurity investments since a 2017 ransomware attack, but the recent incident highlights the ongoing pressure on the healthcare system. The attack has forced some medical practitioners to resort to manual recording of test results, leading to potential errors and reduced capacity for emergency operations. The incident underscores the vulnerability of healthcare systems to ransomware attacks, with recent large-scale attacks affecting US hospitals. Ransomware payments globally exceeded $1 billion last year, with Russian cybercriminals being linked to the top five highest-grossing ransomware variants. The attack on Change Healthcare and Ascension in the US also exemplifies the widespread impact of cyberattacks on healthcare providers.