Audio is streamed directly from the publisher (traffic.megaphone.fm) as published in their RSS feed. Play Podcasts does not host this file. Rights-holders can request removal through the copyright & takedown page.
Show Notes
Vaccination used against smallpox during the Civil War reveals the identity of the distantly related virus used to keep troops disease-free.
Learn more about your ad choices. Visit megaphone.fm/adchoices