The easiest and most effective method is onion decoction. A small onion must be finely chopped. Then pour in a cup or mug boiling. Close with a lid and let it brew for five minutes. After that, you need to drink all this for a couple of minutes. Onions contains the so -called «volatiles», substances that kill the influenza viruses and colds. A similar treatment method is not very tasty, but believe me very effective.