article_snippet.sent: By applying it to the skin and pushing down, Salk's vaccine is delivered in a matter of minutes.
article_snippet.sent: Rather than requiring highly trained medics, minimally trained personnel could go from door to door, quickly administering Salk's vaccine.
article_snippet.sent: It's been 60 years since a mass inoculation of Jonas Salk's vaccine began with school children in April, 1955 that caused polio cases in the United States to drop by almost 90% over the course of two years.
article_snippet.sent: Salk's vaccine was eagerly awaited because, according to the CDC, about 35,000 people annually became disabled because of polio in the U.S. in the 1940s and '50s.
article_snippet.sent: The organization funded the two vaccines -- one created by Jonas Salk's and another by Albert Sabin -- that would lead to the protection of most of the world against polio.
article_snippet.sent: Jonas Salk's's vaccine, developed in the 1950s, involved injecting a virus that was "killed," while Albert Sabin's vaccine -- which Albert Sabin worked on in the 1960s and which was administered orally -- contained a weakened version of polio.
article_snippet.sent: Salk's vaccine Albert Sabin actually helped boost immunity in communities beyond the individual because people shed the weakened virus in people feces.
article_snippet.sent: It came to replace Salk's vaccine Jonas Salk's in many places between 1963 and 1999, according to the Smithsonian.
article_snippet.sent: That is, until the vaccine came on the scene.
article_snippet.sent: But the vaccination effort doesn't stop.
article_snippet.sent: Most American adults were vaccinated as children and don't need another dose.
highlights_snippet.sent: Salk's vaccine began with inoculating school children in April, 1955 .
  