<prompt> Answer this question truthfullyWhat are the 5 Ws used to remember the most common causes of post-operative fever 100.4 and what do they stand for?  <response>: <reason> The 5 Ws used to remember the most common causes of post-operative fever 100.4 are: POD 2-3: Wind atelectasis, POD 3-5: Water UTI, POD 5: Walking DVTPE, POD 7: Wound infection, POD 8-15: Wonder drugs drug fever. 