Why is this more plausible? You don't know her, and are applying a psychological condition to her with no basis whatsoever. Just because you don't want to believe it's true, I assume?

My wife has something similar. Caught it in late February - at the same time as me - and _still_ has debilitating coughing fits some days, and no energy to move some days. Unless you're also going to tell me that's in her head too, and mine.