Before a cough or a cold, you should take precautions to increase the resistance of the body, one of them through food.Some foods seem to be a bulwark against the flu virus.The flu virus typically stimulate … … To up her liquid intake—and sneak in some fruits and veggies without having to chew them—Taub-Dix blends up a … Smoothies. Try not to have fried foods during cold and cough 4. A blocked nose, a cough, and a sore throat are common symptoms of colds and flu.The following foods can help to ease congestion and inflammation and boost the immune system.. 1. These healthy cereal options are a good place to start. With 250 percent of the RDA of vitamin C, a papaya can help kick a cold right out of your system. The fruit helps to enhance the immunity of the body and prevent cold, cough, flu and fever. They help your body get rid of something that's not doing any good … Rich in vitamin C, apples are greatly helpful in treating colds… Histamines are chemicals that your immune system makes. Histamine Dense Foods. Apples are considered to be the most popular source of antioxidants in our diet. 6. Apples.