Sepsis is the body's overwhelming, life-threatening response to an infection — it can develop from almost any source of infection, including chest infections, urinary infections, wounds and post-operative complications. Caught early, it is usually treatable with antibiotics and fluids; caught late, it can cause organ failure, amputations, brain injury or death within hours.
Sepsis negligence claims typically arise when the warning signs are missed or not acted on quickly enough. Patients often do not appear seriously unwell in the early stages, which is exactly why national guidance requires clinicians to actively screen for it: monitoring temperature, heart rate, breathing rate and blood pressure, checking for confusion, mottled skin and reduced urine output, and escalating deteriorating patients promptly. Common failings include sending patients home from A&E or a GP appointment without screening, failing to start antibiotics within the recommended window, and failing to escalate a deteriorating patient on a ward.
The clinical standard is well defined — NICE's sepsis guidelines (NG253 for adults, with separate guidelines for children and for pregnancy, which replaced NG51 in November 2025), and the UK Sepsis Trust's screening tools, set out what should happen and when. A claim must show that care fell below the standard of a reasonably competent clinician (the Bolam test) and that earlier recognition or treatment would, on the balance of probabilities, have avoided or reduced the harm.
Compensation depends heavily on the outcome. Cases involving full recovery after avoidable further treatment may settle in the tens of thousands, while cases involving amputation, organ damage or brain injury regularly reach £250,000 to £1 million or more, reflecting lifelong care, prosthetics and loss of earnings. Fatal sepsis cases are brought by the family under the Fatal Accidents Act 1976. The limitation period is generally 3 years from the harm or the date you became aware it may have been caused by substandard care.