That’s cool.
I wonder how they defined “vaccine” back in ‘51!
Don’t know. If you want a copy, here’s a link:
https://www.amazon.com/Building-Better-English-Workbook-Handbook/dp/B00J1UASW0
The two authors were instructors at Maine Township high school (Des Plaines and Park Ridge, IL). If they were still there in 61, they may have instructed Hilliary, before Wellesly and Alinsky gave her the corrupted lust for power she has held to since.