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Global poliomyelitis cases by type (wild-type type 1 and cVDPV), 2013-2021

Note that in 2017 the graphs for wild-type type 1 and cVDPV cross over so that cVDPV exceeds the number of wild-type cases. (Figure prepared by Dr. Douglas J Lanska from data from the Centers for Disease Control and Prevention and the World Health Organization.)

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Associated Disorders

  • Aseptic meningitis
  • Bulbar polio
  • Bulbospinal polio
  • Infantile paralysis
  • Nonparalytic polio
  • Paralytic polio
  • Polioencephalitis
  • Post-polio progressive muscular atrophy
  • Post-polio syndrome
  • Spinal paralytic polio