Assertion: wart's system | /r/HasProperty | weakened
Facets:
value: because of illness
type: CAUSE
value: because of age
type: CAUSE
Source sentences:
text: But in some cases, according to a study published in journal Viruses in October 2017, the virus may still be present in the body and may become active if a person’s immune system is weakened because of illness or age.
text: It can cause warts to appear any time when your immune system is weakened.