Just hear me out. Chatter Trains Buses.
Charlie Tango Bravo.
CTB
Communication Teat Bed.
Enable smart grip appli……
Aww heck. Never mind.
On Google.
Edward Jenner is considered the founder of vaccinology in the West in 1796, after he inoculated a 13 year-old-boy with vaccinia virus (cowpox), and demonstrated immunity to smallpox. In 1798, the first smallpox vaccine was developed
So it has nothing to do with US?