It has been proven through much research that chocolate brownies are the anti-dote to just about any illness, physical or otherwise. The chocolate has riboflavin which boost the system and generally makes the sick person feel better.
While this most likely be disputed, my daughters and I have tested this out many many times and found it to be true.
One time my oldest daughter (then mid-20s) came by to visit. We both had miserable colds. Sick as dogs, as my mother would say.
We put on Chocolάt, opened a bottle of Champagne/bubbling wine. Then we baked a large pan of deep chocolate brownies. While we watched the movie, we drank wine and ate the brownies (not even bothering for them to cool) straight from the pan.
We laughed, we cried, blew noses, and coughed. We talked about past painful events, apologized, laughed, hugged each other, and fell asleep on the couch.
When we awoke, we felt much better.
Brownies always work.
Note: Not everyone can eat brownies for a variety of dietary restrictions. I hope this post does not offend, and I hope that everyone has a "feel-good" food to eat when sick.