haha, starve a fever, feed a cold.
The logic:
https://www.everydayhealth.com/cold-and-flu/colds-and-fevers.aspx
“We now know that the cold and flu are caused by viruses,” says Curt Gingrich, MD, associate program director of the Riverside Methodist Hospital Family Medicine Resident Program in Columbus, Ohio. “Starving a fever is not helpful. In addition to making sure you are drinking plenty of fluids during an illness, be sure to also get plenty of rest,” says Dr. Gingrich. “If you have a high fever or a fever lasting more than two to three days, you will need even more fluids to keep from getting dehydrated.”