State health officials reported 590 new COVID-19 infections May 20, a slight increase from May 19. And there were 12 newly recorded deaths.
Government and public health officials are trying to get as many people vaccinated against COVID-19 as possible, both here in Arizona and across the country.
The plan generally started with mass vaccination sites, but has since shifted to include smaller, more targeted, community-based models.
Sam Kean is a science writer and host of the podcast "The Disappearing Spoon."
The Show spoke with him, who explained the story of the world’s first vaccine, and how it was distributed, in the 19th century.
