National Gazette

A writer, of the medical faculty, in a New York paper, observes that contagious fevers of the kind now prevalent in Philadelphia, after having apparently become extinct, will for several years after, particularly at autumnal seasons, light up, and frequently exist in their own real form, and prove fatal in their own deadly shape to some of the inhabitants, without spreading or becoming general. The yellow, putrid fevers do also for a long time really affect and so far influence the common endemic fevers of a country and climate, as to change them in some degree, to their own likeness. After these fevers have once raged in any city or place, it is observable that pleurisies, peripneumonies, dysenteries, intermitting and remitting fevers &c. become more dangerous, complicated, irregular, and extremely difficult to cure.