Fact check: Rand Paul defends not wearing a mask, claims 'immunity' to COVID-19. Experts say he can't be so sure.

Fact check: Rand Paul defends not wearing a mask, claims 'immunity' to COVID-19. Experts say he can't be so sure. https://t.co/udmTVSo2hH

— NBC News (@NBCNews) May 5, 2020