4. Elderberries
The elderberry is an ancient and tested herb that has been used for thousands of years to fight the flu virus as well as a number of other diseases. The first thing that this plant does is to boost the immune system, and you can use both the berries of the plant as well as the leaves in order to do so.
In fact, this plant is particularly good for colds because it helps to relieve sinus pain. In addition, studies have shown that elderberry does attack the flu virus and reduces inflammation within the bronchial tubes.
One study showed that it reduces both the severity of the flu and the length of time that the person had the infection when it was given immediately after noticing the very first symptom. That’s the way it is recommended for you to use – at the very first sign of a flu symptom.