Assertion: pneumonia's system | /r/CapableOf | fight off the infection
Facets:
Source sentences:
text: These pneumonias usually resolve over time with the body's immune system fighting off the infection.
text: People age 65 and over are at increased risk because their immune system is becoming less able to fight off infection as years go by.
text: These pneumonias usually resolve over time with the body’s immune system fighting off the infection.