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The hypothesis that SV40 might cause cancer in humans was a particularly controversial area of research, fuelled by the historical contamination of some batches of polio vaccine with SV40 in the 1950s and 1960s. [4] "Persuasive evidence now indicates that SV40 is causing infections in humans today and represents an emerging pathogen."
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.
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 ... is a distinctly contagious illness caused by a virus called poliovirus. ... Polio was “the most feared disease in the world ...
By 1961, only 161 cases of polio were documented. Before the vaccine, the disease had been a major cause of disability in children, according to theMayo Clinic. Several polio epidemics occurred ...
Most of the world’s polio cases are now caused by vaccine-derived virus. In 2023, the number of polio cases caused by vaccine-derived strains was 524, down from 881 in 2022. CNN’s Manu Raju ...
The Horwin's son Alexander Horwin was born on June 7, 1996, and was given oral polio vaccine in November 1997. On August 10, 1998, Alexander was diagnosed with medulloblastoma , a malignant (cancerous) pediatric brain tumor , leading to his death on January 31, 1999.
Before vaccines were available in 1955, polio caused 15,000 cases of paralysis in the US each year. The US eliminated the disease in 1979, but unvaccinated travelers can still carry polio in.