Nobel Goes to Pioneers of Natural-Based Medicines (inventors of ivermectin) from NBC News Oct 5, 2015

The compounds – called artemisinin and ivermectin – are used by millions of people around the world and have saved countless lives. Ivermectin –which now is used to fight pests from bed bugs and lice to serious diseases such as lymphatic filariasis – was derived from naturally occurring bacteria in soil.

https://www.nbcnews.com/health/health-news/new-jersey-based-william-campbell-shares-nobel-prize-medicine-n438511