Assertion: flu | /r/Causes | severe illness
Facets:
value: in people at high risk
type: OTHER
value: often
type: TEMPORAL
Source sentences:
text: Compared with most other respiratory infections, such as the common cold, the flu often causes a more severe illness.
text: But influenza can cause severe illness or death especially in people at high risk (see below).
text: It can cause severe illness and worsen some chronic medical conditions, such as asthma, heart disease, and diabetes.