There are literally hundreds of natural (non-patentable) substances that enhance the immune system to protect against and treat every type of cancer. But they generally don't make the news and don't get the promotion and hype of the pharma-medico industry products and services which can be profited from. That's just the sad reality of how the world of big business works.
Interesting that the recent trial on more than 10,000 women with early breast cancer found that in about 70% of cases chemotherapy actually caused more harm than good. So the industry is looking for another treatment option to push (and profit from). So now, perfectly timed, they offer this one.
