Vaccines: How Do They Work? with Dr. Peter Hotez

Why Is This Happening? The Chris Hayes Podcast - A podcast by Chris Hayes, MSNBC & NBCNews THINK - Tuesdays

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What happens in your body after you get a vaccine? The arrival of the COVID-19 vaccines feels like the first positive mile marker in the pandemic but folks have a lot of questions – How were they developed? How do they work? Is there anything we should worry about?