The common cold. We’ve all had one. Runny nose, congestion, sore throat, sneezing. While cold symptoms vary widely and can include headaches and fever, all colds are respiratory infections. And there are apparently more than 200 responsible viruses. A cold is usually caused by a weakened immune system that ‘opens the door’ to your being unwell. There’s no magic solution for combatting a cold. And once you have one, there is no sure fire cure. But you can help ward off a cold by including foods and nutrients into your diet which are helpful in prevention and remedy of a one. Here are seven foods to include in your diet to maintain (or regain) a healthy immune system.