Fast Cure for Colds, Flu, sore throat

Ive had colds and flu before which could last for 3 days up to a week which could affect office work and productivity. Well I grew tired of paracetamols and other drugs which treat only the symptoms so I tried herbal medicine. I boiled 20 mature guava leaves in 1.5 liters of water for 20minutes I finish the guava tea within the day usually I get cured within one to two days Well it worked for me. Ask the doctor 1st if it is safe to drink.