ummh simbad did i get that right that you don't really mean the flu but rather that condition (which tends to strike men only) of not being able to wash up, vacuum clean, do all the little things that need to be done... thus leaving the chores to others (usually women)?
happens to me too sometimes (one of those rare female cases)... remedies? write a to-do list. get a single item on the list done. congratulate yourself extensively, give yourself a reward, and make sure you get lots of praise. ("Oh, honey, that was sooo nice of you to actually take the garbage out... I know it is your chore anyway and is nothing special really, but still, thank you for your utter abandonment of all personal preferences and very useful contribution to household management. What would I ever do without you?")