How effective was the polio vaccine when it first came out?
The Salk vaccine had been 60–70\% effective against PV1 (poliovirus type 1), over 90\% effective against PV2 and PV3, and 94\% effective against the development of bulbar polio. Soon after Salk’s vaccine was licensed in 1955, children’s vaccination campaigns were launched.
How long were the clinical trials for the polio vaccine?
Dr. Francis made the announcement to a crowd of scientists and reporters at the University of Michigan’s Rackham Auditorium, concluding his two-year national field trials of the poliomyelitis vaccine developed by his former student, Jonas Salk.
What was the effect of Jonas Salk’s polio vaccine?
Thousands of polio cases were reported, 200 children were left paralyzed and 10 died. The incident delayed production of the vaccine, but new polio cases dropped to under 6,000 in 1957, the first year after the vaccine was widely available.
How long did Jonas Salk work on the polio vaccine?
Salk worked incessantly for two-and-a-half years. Salk’s inactivated polio vaccine came into use in 1955.
When did Jonas Salk start working on the polio vaccine?
In 1947, Salk took a position at University of Pittsburgh, where he began conducting research on polio, also known as infantile paralysis. By 1951, Salk had determined that there were three distinct types of polio viruses and was able to develop a “killed virus” vaccine for the disease.
What was the booster shot that left a scar?
In 1972 , doctors discontinued smallpox vaccinations in the United States, except among people at risk of exposure to the infection — in a lab, for example. The smallpox vaccine left behind a scar at the injection site.
Did Salk patent the polio vaccine?
Salk was immediately hailed as a “miracle worker” when the vaccine’s success was first made public in April 1955, and chose to not patent the vaccine or seek any profit from it in order to maximize its global distribution….
| Jonas Salk | |
|---|---|
| Alma mater | City College of New York New York University |
| Known for | First polio vaccine |