why?

Why am I always so surprised at the total weakness that remains with me after the flu? For day, weeks after the symtoms are long gone, there's no get up and go. And I must get up and go to work. Luckily a class was cancelled, but those kids I teach are the best diagnosticians. They can always tell when I'm tired, weak, sick, distracted, and they take full advantage.

So I had better get off of the computer and prepare myself.