Third, build up your immune system. Eliminate fatty foods, refined sugar, white flour, salt, coffee, alcohol, tobacco and recreational drugs. Drink plenty of pure water. Take supplements of vitamins A, C, E and zinc. Echinacea and Goldenseal have also proved helpful.
Some folks suggest daily doses of colloidal silver as well as gargling with it.
This is not a cure-all, but it will help. Hot water helps kill bacteria, mold and yeast particles. If you get a severe sore throat or cough up green phlegm, go to the doctor immediately. Green phlegm means a bacterial infection either in the lungs or in the upper respiratory tract. Bacterial infections multiply rapidly and can only be killed by antibiotics and then, they are not always effective.