They contain compounds the relieve congestion and keep your immune system strong. Tea contains
theophylline which breaks up congestion and quercetin which helps viruses from multiplying. Home made chicken soup not canned helps prevent cold and flu systems. In research it was shown that it was able to prevent white blood vessels from causing inflammation in airways. Make sure the broth is not made from bouillon or it won't work per the research studies. You can also take a bite of a hot pepper it contains a compound capsaicin which will help you breath better.