if a neccesary symptom of the flu is fever, then I haven't got a flu in 20 years, which is the time I had ME. What I do have are colds and flu-like infections with fatigue and pain. When I do, I take a medication than along with other drugs contains pseudoefedrine, it's quite effective for the pain and fatigue sometimes. Pure pseudoefedrine is impossible to get in Argentina, every product that contains it does it along some other drugs, I guess in order to prevent it from being used to manufacture illegal drugs, which is a shame, since it seems to help me with POTS, to a degree