Cold and flu is a common health problem due to which people have to miss office and stay at home. The main cause of this problem is spreading of virus infection from infected people and objects. Cold and flu causes body pains, coughing, sneezing and fever. There is sore throat, congestion and dripping from the nose. The patient feels very miserable due to this. You can protect yourself from this problem by boosting your immunity. Cold and flu can be prevented very easily by taking some steps. Adopt good hygiene habits that will prevent spreading of infections. Following are 20 surprising ways to prevent colds and flu.