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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.
Two of the most prominent were smallpox and polio—both largely conquered in the U.S. with vaccines. Before the smallpox vaccine, many people bore deep scars on their faces and bodies (if they ...
The U.N. agency estimates that 1 in 200 polio cases results in permanent paralysis, usually of the legs. ... in reducing the number of cases caused by the wild polio virus. Vaccine-related cases ...
However, circulating vaccine-derived poliovirus (variant poliovirus, cVDPV) of all three serotypes continues to circulate and cause paralysis, having been detected in 32 countries in 2023. [38] Specific strains of each serotype are used to prepare vaccines against polio.
As evidence to the success of polio eradication efforts, the vaccine-derived polioviruses (cVDPVs) nowadays cause more cases of polio paralysis than the wild type virus itself in many places, such as the Congo. [51] Polio has also resurged in areas of Pakistan, India and Bangladesh. [52] [53]
Polio vaccination is considered one of the greatest achievements in global public health. it was once a disease that paralyzed and killed thousands of Americans during outbreaks, but the advent of ...
In extreme cases polio can cause paralysis, usually in the legs, although movement typically comes back within a few weeks or months. However, it can be life-threatening if it paralyses the ...
He had developed an attenuated poliovirus vaccine, which he tested in about 10,000 children across much of the United States and Canada. [11] Five of these children died of polio and 10 more were paralyzed, usually in the arm where the vaccine was injected, and frequently affecting children in towns where no polio outbreak had occurred. [11]