You're ignorant and don't knw what you're writing. Measles vaccine was not developed until the 20th Century. The measles vaccine was created in 1963.
However, Smallpox was a problem for the Colonies in their fight against King George. Cow pox was used to inoculate the troops.
"It would be more precise to say that Washington ordered inoculations, not vaccinations, as the smallpox vaccine had not yet been developed. As vaccinations are a form of inoculation, and as these words are often interchangeable, we’ve marked this as mostly true.
As Washington and the Continental Army battled the British for America’s independence during the Revolutionary War, the soldiers faced an even deadlier foe in the form of smallpox. Washington saw the effects of this disease firsthand during his siege of Boston in 1775."
As commander of the Continental Army, Washington faced dual enemies: the British and smallpox. So he made a risky call.
www.history.com