Overall, one of the simultaneously amazing and depressing things about modern medicine is that treatments that were the gold standard only a generation or two ago now look as barbaric as leeches and bloodletting (leeches are back in vogue, anyway).

Considering that by some measures we have made hardly a dent with our 40-year war on cancer (https://blogs.scientificamerican.com/cross-check/sorry-but-s...), I feel confident that this is but the start down the road of immunotherapy.