Catherine the Great Letter Extolling Virtues of Vaccination Is Up for Auctionhttps://www.smithsonianmag.com/smart-news/letter-from-catherine-the-great-on-smallpox-vaccination-goes-up-for-auction-180979121/ by pseudolus • 5 years ago 9 2 5 years agoSMsmithsonianmag.com