Although for most people the infection is mild, it can be severe and even deadly in people with compromised immune systems, including infants, the elderly, and people with diseases such as cancer and AIDS . In the past, huge epidemics of influenza have caused millions of deaths. Refer to the individual supplement for information about any side effects or interactions. 4 Echinacea appears to work by stimulating the immune system. The effect of the berries of the black elderberry on influenza has been studied in a small double-blind trial.
Some doctors recommend taking several cloves of raw garlic per day during an infection.
Boneset has been shown in test tube and other studies to stimulate immune-cell function. This may explain boneset's traditional use to help fight off minor viral infections, such as the flu. Wild indigo contains polysaccharides and proteins that have been reported in test-tube studies to stimulate the immune system. The immune-enhancing effect of wild indigo is consistent with its use in traditional herbal medicine to fight the flu. Refer to the individual herb for information about any side effects or interactions.