> the surprisingly long and fascinating history of using immunotherapy to treat cancer Well yeah, it has been known for a long time that cancer can do what it

> the surprisingly long and fascinating history of using immunotherapy to treat cancer Well yeah, it has been known for a long time that cancer can do what it does because of the immune system's failure to eliminate the "defective" cells. Also, there are the rare "spontaneous remissions" where, for some reason, the immune system eventually catches up and manages to destroy the cancer. So there have been many attempts to harness the immune system in cancer treatment. Glad to see that all that work is finally bearing fruit (fingers crossed)...