These are the most common contagious viral diseases, this is considered as a cause of low immune system. Recovering of immune system helps fight these diseases and can be recovered with proper rest, sleeping, Vitamin C intake, having plenty of water and avoiding sugar.
Common cold that also accompanies flue is nothing but a sensitive viral infection of the upper respiratory tract. Symptoms are runny nose, depression, vomiting, fever, cough, irritation in nose, and sore throat. Some other symptoms can also form if the condition worsens, like sour throat which actually require some antibiotics and proper medical treatment.
Simply the causes for Cold and Flue are viral infections that can be spread through the air (person sneezing) or by other unhygienic things. However, some very common home remedies can easily fix this infection like for example paste of Garlic, honey and black pepper. Apart from this Licorice, Goldenseal, Echinacea roots make our immune system strong and fight viruses easily.