Assertion: polio's symptom | /r/HasProperty | severe headache
Facets:
Source sentences:
text: Symptoms include fever, severe headache, stiff neck and back, and deep muscle pain.
text: Symptoms appear usually with no sign of a prior illness 7-14 days after exposure to the virus, particularly in older children and adults, and may include fever, severe headache, stiff neck and back, deep muscle pain, and sometimes areas of hyperesthesia (increased sensation) and paresthesia (altered sensation).