Phoenix-Rising's reports from recent IACFS conference featured a study delineating the different types of fatigue that people have since fatigue is such a vague term. What I'm wondering is: is the flu-like fatigue present mostly for the folks with post-infectious onset or present in folks with other types of onset as well (e.g. developed after FM, surgery, trauma, emotional stress, etc.)? I'm not talking about severity of fatigue. I had onset after two back-to-back flu-like episodes and feel like I am not at the worst part of the flu but rather the middle-tail end where you're recovering but not ready to go back to usual activities. Joints/ upper back ache (but not outright pain), able to think but requires more effort (like thinking with a head cold present). Just curious!