It knocked me for a loop for about three or four days. My fever spiked at 103.1 for about four hours the first night. After that, I had a couple of days where I had a bad cough and felt like I'd been run over. By the end of the week, I was feeling just fine.
Same for the wife & I, in early May; and for the couple we caught it from.
They brought it back from a regional convention they attended, and then came for dinner before the symptoms really hit; they thought they were just tired from the trip.
Some of the mildest flu we've ever had; just one day spent mostly in bed with a fever, then a couple of days of that run over feeling.
As an asthmatic, the coughing lingured, until I broke down and used some Prednisone.