Sepsis, also known as blood poisoning and septicaemia, is an infection which, according to UK Sepsis Trust, affects around 250,000 people each year and causes 52,000 deaths, approximately 14,000 of which are probably preventable. It occurs when the body responds to an infection and the immune system overacts, which can cause inflammation in many parts of the body and damages organs and tissues. If not diagnosed and treated quickly, sepsis can lead to multiple organ failure and can even be fatal. If mistakes during diagnosis have been made which has led to the sepsis getting much worse, you may be entitled to No Win No Fee compensation for medical negligence.