How do they find out with the experiments?”…one way they can find out a whole lot is to make an animal ill and then try different ways to make it better until they find one that works.”But isn’t that unkind to the animal?”Well, I suppose it is…but I mean, there isn’t a dad anywhere who would hesitate, is there, if he knew it was going to make [his child] better? It’s changed the whole world during the last hundred years, and that’s no exaggeration.

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