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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.
Human infectious diseases may be characterized by their case fatality rate (CFR), the proportion of people diagnosed with a disease who die from it (cf. mortality rate).It should not be confused with the infection fatality rate (IFR), the estimated proportion of people infected by a disease-causing agent, including asymptomatic and undiagnosed infections, who die from the disease.
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 ...
[61] [62] Recent polio cases arise from two sources, the original "wild" poliovirus (WPV), and the much more prevalent mutated oral vaccine strains, known as circulating vaccine-derived poliovirus (cVDPV) or variant poliovirus. Vaccines against each of the three wild strains of polio have given rise to strains of cVDPV, with cVDPV2 being most ...
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.
Although a polio vaccine was developed in the 1950s that nearly ended the disease, it still exists in a handful of developing countries. While at Stony Brook, in 1993, Gromeier engineered the virus he’d later use in the Duke cancer trials, swapping out a critical part of the structure with the equivalent part of the human rhinovirus , which ...
Polio is a highly infectious disease caused by the poliovirus. The disease was eradicated in the U.S. in 1979, and the country hasn't seen a case of domestically acquired wild polio since.
Poliomyelitis, known as the disease Polio, is a highly infectious disease caused by a virus that lives in the throat and intestinal tract of those infected with it. It caused severe illness in thousands of people in the United States each year until the vaccine was introduced in 1955.