Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
In addition to flulike symptoms, polio was known to cause muscle stiffness and paralysis.
Source: https://www.discovermagazine.com/health/what-is-an-iron-lung-and-how-does-it-work