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Number of wild poliovirus type 1 cases, by country and month of paralysis onset--worldwide, January 2021-March 2023

Abbreviation: WPV1 = wild poliovirus type 1. (Source: Lee SE, Greene SA, Burns CC, Tallis G, Wassilak SG, Bolu O. Progress toward poliomyelitis eradication--worldwide, January 2021-March 2023. MMWR Morb Mortal Wkly Rep 2023;72[19]:517-22. Public domain.)

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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