Having a sore throat is usually an indication that there is an underlying infection of some kind; in fact, it is one of the first symptoms to typically appear before you get sick. Echinacea is a fast and effective immune system booster, so if you take it fast enough, at the first sign of a scratchy throat, you may be able to knock out the infection before it can spread. Echinacea tea is widely available in most parts of the world, but for a more concentrated dose of immune system power, Echinacea herbal supplements are also an option.