Everyone knows  names of big killers like cancer, heart disease and stroke, but few people are aware of one of  biggest killers - sepsis. Sepsis is  life-threatening condition. Doctors say it is responsible for one in five deaths worldwide. Sepsis happens when our body's response to  infection injures our own organs. Our body normally releases chemicals into  blood to fight  infection. Sepsis occurs when  body releases too many of these chemicals.  chemicals overload our organs and damage them. This damage can lead to organ failure and death. Doctors have traditionally called this blood poisoning. More than half of  sepsis cases reported worldwide occur in children, many of whom are newborn babies.
 study into sepsis was published on January the 16th in  medical journal "The Lancet". Researchers estimated that over 50 million people  year develop sepsis and over 20 per cent die from the illness. This is more than double  percentage previously estimated. The researchers said sepsis kills more people than cancer. Professor Mohsen Naghavi,  senior author of  research, said: "We are alarmed to find sepsis deaths are much higher than previously estimated, especially as  condition is both preventable and treatable." He said more research is needed to stop sepsis killing newborns. Doctors can treat sepsis with antibiotics if  condition is found early.