I recently found out that the Flu medication Tamiflu contains an extract of star anise. Star anise is a star shaped spice from Asia that is used in asian cooking. It is used in vietnamese beef pho. I'll post some information I found about this spice:
Recently amidst the big scare of Swine Flu world wide, Star Anise, a traditional tasty spice has hit the news and drew attention of both scientists and media alike. This article throws light on Swine flu, it`s symptoms, prevention and cure and the various uses of Star Anise.
http://healthmad.com/conditions-and-diseases/swine-flu-tami-flu-and-star-anise/