Assertion: flu's symptom | /r/HasProperty | unusual
Facets:
Source sentences:
text: Symptoms in 1918 were so unusual that initially influenza was misdiagnosed as dengue, cholera, or typhoid.
text: Indeed, symptoms in 1918 were so unusual that initially influenza was misdiagnosed as dengue, cholera, or typhoid.
text: Symptoms in 1918 were unusual, initially causing influenza to be misdiagnosed as dengue, cholera, or typhoid.