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Poliomyelitis (/ ˌ p oʊ l i oʊ ˌ m aɪ ə ˈ l aɪ t ɪ s / POH-lee-oh-MY-ə-LY-tiss), commonly shortened to polio, is an infectious disease caused by the poliovirus. [1] Approximately 75% of cases are asymptomatic; [5] 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.
Type 3 (WPV3) is last known to have caused polio in 2012, and was declared eradicated in 2019. [59] All wild-virus cases since that date have been due to type 1 (WPV1). [60] As of August 2024, Afghanistan and Pakistan are the only two countries where the disease is still classified as endemic.
Vaccine contamination with Simian vacuolating virus 40, known as SV40 occurred in the United States and other countries between 1955 and 1961.. SV40 is a monkey virus that has the potential to cause cancer in animals and humans, although this is considered very unlikely and there have been no known human cases. [1]
The polio vaccine has all but obliterated the illness that once killed thousands and paralyzed 15,000 people nationwide every year. ... is a distinctly contagious illness caused by a virus called ...
Polio is “shorthand for poliomyelitis, a disease of the central nervous system caused by infection with poliovirus,” Dr. Richard Lloyd, professor of molecular virology and microbiology at ...
An unvaccinated NY man has polio, the first documented case in the U.S. since 2013. Here, doctors explain what polio is, its causes, symptoms, and vaccines.
However, in a cancerous environment, this is still possible. In the process of replicating, the virus releases toxins that poison the cells, indicating cancer cells could be killed. Gromeier performed seven years of safety studies, which included tests on 39 monkeys, to show that the virus does not, in fact, cause polio.
Some research has focused on utilizing a genetically modified polio virus — modified so it does not cause disease in normal cells — as a treatment, and this research is underway to understand ...