Marvin Sackner, in 1978, conducted a study showing that drinking chicken soup was significantly better at clearing up congestion in the nose compared with drinking hot or cold water.That's probably due to the sodium. Salt water loosens biofilms.
In 1980, Irwin Ziment showed that chicken broth helps to thin mucous in the lungs with a higher effect being achieved when the broth was spiced. His study was followed up by Stephen Rennard in 2000 who argued that chicken soup, by reducing mucous in the lungs, supported the white blood cells in fighting a cold.
It also contains Glutamine- which reverses intestinal permeability and helps guts heal.
It's probably better for us to eat it with egg drops instead of noodles though. (whisk an egg then drop the batter into the broth when it is vigorously boiling.)
Happy recovering. Have some white tea too.