On Mar. 27, 2015, the U.S. Centers for Disease Control and Prevention (CDC) published new Immunization Practices Advisory…
In 1917, Mather H. Neill discovered that scrotal reactions of guinea pigs with “Mexican” typhus (later known as…
In 1914, the first typhoid vaccine was licensed in the U.S. in 1914. Typhoid immunization was required of…
On Sept. 30, 1911, typhoid immunization became required of all U.S. service members. The U.S. Army became the…
In 1909, Drs. John F. Anderson and Joseph Goldberger confirmed Charles Nicolle’s finding that the body louse was…