What are the Symptoms??
If one of your characters came down with the flu/cold, would you know what symptoms to write about? I'm only bringing this up because I have come down with something and every part of me is exhausted. And then there is this cough from hell that won't go away. And how I look at the moment, I won't even go into. Thank heavens for Robitussin!! It's at least knocking me out for a few hours each night!
Now it's your turn to come up with how your character would act if he or she came down with something like this! I wonder if he or she would be a better patient than I am being at the moment??