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In the control group, Brodie reported that five out of 4500 developed polio; in the group receiving the vaccine, one out of 7,000 developed polio. This difference is not quite statistically significant, and other researchers believed that the one case was likely caused by the vaccine. Two more possible cases were reported later. [11]
On April 12, 1955, following the announcement of the success of the polio vaccine trial, Cutter Laboratories became one of several companies that was recommended to be given a license by the United States government to produce Jonas Salk's polio vaccine. In anticipation of the demand for vaccine, the companies had already produced stocks of the ...
Polio: An American Story by David M. Oshinsky, professor of history at the University of Texas at Austin, documents the polio epidemic in the United States during the 1940s and 1950s and the race to develop a vaccine, which led to 2 different types of polio vaccine: inactivated poliovirus vaccine, developed by a team led by Jonas Salk, and oral poliovirus vaccine, developed by a team led by ...
In October, 1952, Cox reported that he had grown the Lansing strain of polio virus in fertile hens' eggs, and in 1961, he announced an oral polio vaccine. [1] Meanwhile, human trials of Albert Sabin's successful oral vaccine had begun in 1957, and it would be licensed for general use in 1961. [2]
A few years later, during a polio outbreak in Canada, "masked bandits" stole 75,000 Salk vaccine shots from a Montreal university research center. [25] Just months after the vaccine's success was announced, American President Eisenhower signed the Polio Vaccination Assistance Act of 1955, to ensure the vaccine would be distributed to the public ...
The first accident involving a 737 was on July 19, 1970, when a 737-200 was damaged beyond repair during an aborted takeoff, with no fatalities; the first fatal accident occurred on December 8, 1972, when United Airlines Flight 553 crashed while attempting to land, with 45 (43 on board plus 2 on the ground) fatalities; and, as of February 2024 ...
Albert Sabin, a virologist who publicly disagreed with Salk and his killed vaccine, worked on creating a vaccine with live attenuated vaccines. [5] In January 1956, despite Cold War tensions, Mikhail Chumakov, the director of Moscow's Polio Research Institute, along with his wife virologist Marina Voroshilova, and his colleague Anatoli Smorodentsev, traveled to the U.S. in order to study the ...
Thomas Francis Jr. (July 15, 1900 – October 1, 1969) was an American physician, virologist, and epidemiologist who guided the discovery and development of the polio vaccine being worked on by his student Jonas Salk.