Opinion: I’ve seen what life is like without vaccines. Americans need to understand what they save us from

I have spent much of my career responding to infectious diseases in places where vaccines were desperately needed but not always available.

In Haiti, I watched a patient die of tetanus, their body seized by violent, agonizing spasms until they could no longer breathe. Watching someone die that way from a disease a simple vaccine can prevent is something I have never forgotten.

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