International relations expert and Atlantic contributor Tom Nichols has little patience for the anti-vaccination movement. "The people who say things like, 'I'm not getting the vaccine. And if there are passports, I'll get a fake one'... It's time to begin stigmatizing them in the same way that we would have stigmatized people who didn't want to get a polio vaccine or a smallpox vaccine in an earlier time." In a conversation with Ian Bremmer, Nichols shares his views on whether vaccines should be mandatory and the merits of vaccine passports. The interview on GZERO World airs on US public television starting April 30 - check local listings.

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