Polio (Poliomyelitis)
A crippling disease on the brink of global eradication. Two effective vaccines—Salk (IPV) and Sabin (OPV)—have brought the world close to elimination.
Overview
Poliomyelitis (polio) is a highly infectious viral disease that primarily affects children under 5 years of age. The virus is transmitted through contaminated water and food and multiplies in the intestine. In approximately 1 in 200 infections, the virus invades the nervous system, causing irreversible paralysis (WHO, 2024).
Global polio eradication remains a top public health priority. The WHO's Global Polio Eradication Initiative (GPEI), launched in 1988, has reduced cases by 99.9%. As of 2024, wild poliovirus remains endemic in only two countries: Afghanistan and Pakistan (CDC, 2024).
The United States has been polio-free since 1979. However, the threat of importation remains, making continued vaccination critical.
Vaccines: Salk vs Sabin
IPV (Inactivated - Salk)
- Type: Inactivated (killed) virus
- Introduced: 1955
- Administration: Injection
- Protection: Induces humoral immunity
- Advantages: Safe for immunocompromised
- U.S. Status: Used exclusively since 2000
OPV (Oral - Sabin)
- Type: Live attenuated virus
- Introduced: 1961
- Administration: Oral drops
- Protection: Humoral and intestinal immunity
- Advantages: Easier administration, spreads
- Global Use: Still used in endemic countries
CDC Recommendations (U.S.)
The U.S. uses IPV exclusively. Children receive doses at 2 months, 4 months, 6-18 months, and 4-6 years. Adults who are unvaccinated or have unknown status should receive 3 doses.
Sources & Citations
Standard of Care: Clinical Management
Vaccination remains the most effective strategy for preventing polio. The following describes established medical consensus for clinical management for those who contract infection.
Clinical Management
No antiviral treatment exists for polio. Management is entirely supportive — pain relief, hydration, and respiratory support (including mechanical ventilation for respiratory paralysis). Early physical therapy is essential for long-term neuromuscular outcomes and reducing permanent disability. Post-polio syndrome may develop decades later and requires ongoing management.
Disclaimer: This information is for educational purposes only. Treatment decisions must be made by a qualified healthcare provider.