We have a pre-existing treatment, developed and tested over millions of years, which is our immune system. Rather than throwing monkey wrenches in it and trying to manipulate and control it (always risky with a complex biological system), it would seem to better serve the public to figure out ways of supporting what we already have.

Of course, since that would involve changing our toxic environment and eating real food rather than profitable crap, under our current system it ain't never gonna happen—at least not on a large, government-supported scale.