Rosemary is often thought of as a culinary ingredient before a medicinal agent, but in fact, this humble herb can have very powerful effects on the West Nile Virus. Rosemary is diaphoretic and antiviral in nature, meaning that the active ingredients can seek out the underlying virus and help neutralize it, while also promoting the expulsion of the toxins through sweating. A diaphoretic helps the pores open and release toxins through the skin along with perspiration. Add a dash (or two) of rosemary to your stews and curries, brew a tea from the leaves, or buy a concentrated form of rosemary as an herbal supplement.