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"Though there hasn’t been a single case of polio in the United States since 1979, a significant number of people are still thought to be living with the after-effects."
PolioArmed with the knowledge of different virus types of the same virus gr — Polio
"Armed with the knowledge of different virus types of the same virus group, scientists worked on vaccines against all types to prevent all disease. By 1954, after decades of well-funded research, Jonas Salk and his team developed the first killed virus vaccine. It was a vaccine against polio, and it went against the dogmas established at the time: the vaccine had to contain live/attenuated virus, and that a dead virus could not cause an immune response. * Later, other researchers would test various vaccines, including vaccines for polio and measles, in institutionalized subjects. These tests, conducted by Salk, Hilary Koprowski, MD, and others, usually did not deliberately infect subjects with the disease agent."
Polio
Polio
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Poliomyelitis, commonly shortened to polio, is an infectious disease caused by the poliovirus. Approximately 75% of cases are asymptomatic; mild symptoms which can occur include sore throat and fever; in a proportion of cases more severe symptoms develop such as headache, neck stiffness, and paresthesia. These symptoms usually pass within one or two weeks. A less common symptom is permanent paraly
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"The only human infectious disease to be eradicated through vaccination is smallpox. Polio is on the verge of being eradicated, with cases of the wild (not vaccine derived) strain only found in Central Asia."
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"Some people assume that because diseases like polio have disappeared from the United States, it’s no longer necessary to vaccinate children against them. However, polio is still widespread in other parts of the world, and could easily begin re-infecting unprotected individuals if it were re-introduced to the country."
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"In the 1940s, scientists worked on vaccines against influenza, polio, measles, and other viruses deemed critical national security importance. That decade brought vaccines against influenza, which was then understood to be not just one virus, but several types of influenza virus for which different vaccines would be needed. Similarly, polio was understood to be three types of virus in the same group, so a vaccine against one type did not protect against the others."
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"The health benefits associated with relatively recent advances in vaccine therapy are well documented.To mention just a few: in 1921 there were nearly 207,000 reported cases of diphtheria in the United States. In 1991, there were two. In the same year, apart from a small number (five to ten) of vaccine-associated cases, there were no reported cases of poliomyelitis, as compared with more than twentyone thousand in 1952; “The CDC projects that the world will be polio-free by 2003."
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"The Salk vaccine trial successfully showed that the vaccine helped prevent paralytic polio, and licensure of the vaccine quickly followed. The disease that once paralyzed thousands of children has now been eliminated in the Western Hemisphere."
Polio