During flu season, we usually know what the problem is after getting a high fever. The same goes for a bout of nausea, fatigue or body aches. From late fall through early spring, with a peak of activity occurring sometime between December and February, those symptoms tip us off to the virus. The flu comes with a set of very noticeable symptoms that often stop us in our tracks.
But, even with those troublesome signs, for most people the virus remains mild.