Elderberries

showed that elderberry extracts were able to block the H1N1 viruss ability to infect host cells. That means it is a potent antiviral. Okay, so maybe you dont have an elderberry tonic stored in the back of your fridge, but if you find it or decide to make some, know that elderberries are great virusfighters. Some even claim it can reduce the duration of colds and upperrespiratory infections.