Letter to the Editor
Leavitt
J W
JW
D001432:Bacteriology / Q000266:history; D002353:Carrier State; D006291:Health Policy / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D009519:New York City; D011634:Public Health / Q000266:history*; D014435:Typhoid Fever / Q000266:history*