A great summary of how disease works, and how to kick your immune system into gear. This is by Mark James Gordon. I have not used the products he recommends. But I must credit him with creating this video. If you are curious to know more about him and the products he works with on Website: http://www.markjamesgordon.com. I am not selling or promoting him, I am just crediting him with making this great video and as an fyi, a great teaching tool.