Assertion: pneumonic plague | /r/HasProperty | uncommon
Facets:
value: naturally
type: DEGREE
Source sentences:
text: Naturally occurring pneumonic plague is uncommon, although small outbreaks do occur.
text: Pneumonic plague occurs in two forms, secondary and primary, both of which are frequently fatal and potentially contagious to close contacts.47,48 Secondary pneumonic plague is the more common form and arises through hematogenous spread of bacteria from a bubo or other source.