. "yellow fever epidemic" . . "ongoing problem" . "1793 Philadelphia yellow fever epidemic" . "Philadelphia Yellow Fever outbreak" . . "yellow fever epidemic in the city" . . "Yellow Fever epidemic of 1793" . "yellow fever epidemic that had struck that city in 1793" . . "yellow fever epidemic of 1793" . . "1793 yellow fever outbreak" . "1793 Philadelphia yellow fever epidemic#Aftermath" . . . "1793_Philadelphia_yellow_fever_epidemic#Aftermath" . "1793 yellow fever epidemic" . "1793" . "1800\u20131803 Spain yellow fever epidemic" . . . "1793 Philadelphia Yellow Fever Epidemic" . "yellow fever epidemic broke out in Philadelphia" . "Yellow Fever Epidemic of 1793" . "controversy" . . "an epidemic of yellow fever" . . "yellow fever" . . "Yellow fever outbreak in Philadelphia" . . "1793 Philadelphia yellow fever epidemic" . .