The campaign to vaccinate Americans, and the backlash that ensued, didn’t start with the current pandemic. It began in a sleepy Pennsylvania town in the late 1800s when a doctor and his wife bet everything they had on a new formula to eradicate smallpox. The Spirit of Swiftwater tells their story of hardship and success. Discover how vaccines are made and who makes them on Amazon (click on the link “New from $15) or on eBay.