The headline pretty much says it all: Cheap, safe drug kills most cancers
The drug in question. dichloroacetate (DCA). has been used to treat other conditions for years so it seems pretty certain its safe.
It's also not covered by any patents so it should be very cheap to mass-produce.
The description of how it works suggests it might only work on solid tissue cancers not lymphomas, skin cancers or bone marrow cancers.
But still, great news.