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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.
Furthermore, the attack rate on this group was 1.6%. Two-year-olds had the highest attack rate per 100,000 people at 1.84%. [4] Additionally, the death rate was very high, particularly for the younger age groups. At the height of the epidemic, which was from June 1 to November 1, the death rate from polio in the greater New York City area was ...
Accordingly, the rate of paralysis and death due to polio infection also increased during this time. [1] In the United States, the 1952 polio epidemic was the worst outbreak in the nation's history, and is credited with heightening parents' fears of the disease and focusing public awareness on the need for a vaccine. [26]
The polio vaccine has all but obliterated the illness that once killed thousands and paralyzed 15,000 people nationwide every year.
With a single case of paralytic polio detected in Rockland County, New York, and the virus showing up in wastewater samples in two counties in the state, as well as New York City, health officials ...
The polio vaccines prevented 29 million cases of paralytic polio between 1960 and 2021, compared with a counterfactual world with no vaccines, according to researchers’ estimates.
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.
1955 newspaper headlines on the development of an effective polio vaccine. During the early 1950s, polio rates in the U.S. were above 25,000 annually; in 1952 and 1953, the U.S. experienced an outbreak of 58,000 and 35,000 polio cases, respectively, up from a typical number of some 20,000 a year, with deaths in those years numbering 3,200 and ...