What is post-polio syndrome and its typical features?

• A. Seizures and cognitive decline
• B. A late complication years after acute polio with new weakness, fatigue, and pain, without new poliovirus infection due to motor neuron loss and aging processes
• C. Acute fever and rash
• D. Recurrent polio infection

Answer: (B)

Post-polio syndrome is a late complication that can appear years after the initial polio illness in someone who had poliomyelitis. It presents with new or increasing muscle weakness, fatigue, and often pain, sometimes in muscles that were previously affected and sometimes in others. Breathing or swallowing difficulties can occur in some cases. Importantly, there is no new poliovirus infection; the symptoms reflect long-term changes in motor neurons—the neurons damaged by polio and the aging process—leading to progressive weakness and reduced endurance over time. This combination of late onset weakness plus fatigue and pain after a prior polio history, without evidence of a new infection, is what makes this description the best match. Seizures or cognitive changes aren’t typical features of post-polio syndrome, fever and rash point to a different infection, and recurrent polio infection does not happen, as polio does not reinfect in this way.