Basic is avoid excess exposure to outside dust and allergens like pollens etc drink warm water and avoid contact with person having cold

please consult with me on chat will suggest medicines

Avoid exposure to cold.. wear warm clothes..

Only your immune system can protect you from viral infection. There is no problem if you get infected but it should not stay for a very long periods. To keep your immune system up 1. Fill in nutritional deficiencies 2. Don't eat antigenic and inflammatory foods 3.regular exercise to keep the flow in lymphatic system (this helps in detoxification)