I have tea on the recommendation of a colleague tried, and had no more colds since (8years)! Whenever something comes up, immediately drink 2 liters of it, and it's gone! Everything is related to viruses, bacteria or fungi, responded. So even flu and Nor, cystitis, etc ... I always buy a kilo because I give so much of it. And as low as you can get here in the tea so good quality nowhere. This tea was a begertes remedies from the Mediterranean, and the export of the Greeks already 2500 years ago.