a syringe filled with fluid is seen against a dark backround
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Onesimus

The Man Who Taught America About Inoculation In 1706, Boston Massachusetts Puritan preacher Cotton Mather was given a human as a “gift” from his church congregation. Mather renamed him Onesimus, a Greek word for “useful.”  In 1716, Onesimus purchased half of his freedom after being permitted to work for wages outside the home, but was still required to…