<p><span class="deck">Yellow fever killed 4,000 in Philadelphia in 1793, and puzzled doctors ignored the real clue to blame “miasmata” in the air.</span></p>
<p><span class="deck"> <span class="typestyle"> Medicine was primitive and their knowledge of it limited, but in their hazardous journey to the Pacific, Lewis and Clark lost only one patient</span> </span></p>
<p>Rush was a visionary writer and reformer, a confidant to John Adams, Washington's surgeon general, and opponent of slavery and prejudice, yet he's not a well-known founding father. </p>