How long would you guess vaccination has been around? 50? 100 years? In fact, it's an idea that's older than this country. In 1776 America's at war with England and Washington's army has taken back Boston. But in the middle of this terrifying time, Abigail Adams, the future first lady of the United States, makes a fateful decision to travel to Boston and use a controversial new scientific technique to protect her 5 children against a threat more dangerous than an army of Redcoats.