Everybody has had an infection some time in their lives....bronchitis, ear infections, influenza etc etc and Sepsis is relatively uncommon.
How do you sort the wheat from the chaff, how do you spot the deadly condition of SEPSIS...difficult....very very difficult. There is no one sign or symptom that gives the diagnosis and hence it is missed.
All doctors have misdiagnosed potentially fatal conditions and will continue to do so.
The main feature....does the patient look ill. That is the crucial feature....the doctor using his senses and not relaying on modern technology to make a diagnosis.
The other factor is that SEPSIS come on quickly, so a doctor can see a patient and reassure, but within 24 hours or less the diagnosis of a life threatening condition can become apparent.