The boys end up in the jungle with varying degrees of immunological protection and Chris subdues a jungle cat. So what are the arguments against vaccination and are they warranted? They discuss arguments like better sanitation, Big Pharma conspiracies, aborted fetuses, autism, chemical preservatives and “too many, too soon”. In a surprising twist, the Catholic Church comes to their defence. Also: Jacob Meza sees a big difference in how young and old people view vaccines; the world’s first genetically edited babies are here (maybe); and the Multiple Sclerosis Society of Canada recommends people with the disease up their dosage of vitamin D.