When you are sick and pretty much bedridden...

with a cold or flu, do you consume more calories because your body's immune system needs extra energy to fight bacteria or less because you're completely sedentary?

no

dieting

when

you're

ill.

Just eat a normal amount of calories. Unless, you have a stomach virus/can't keep food down - then you need to stick with clear, caloric liquids (7up, sprite, clear broth based soups) for a few days, and then move onto something like toast with butter.