In children
Fast
breathing or trouble breathing
Bluish or gray skin
color
Not drinking enough
fluids
Severe or persistent
vomiting
Not
waking up or not interacting
Being
so irritable that the child does
not want to be held
Flu-like
symptoms improve but then return
with fever and worse cough
In adults
Difficulty
breathing or shortness of
breath
Pain
or pressure in the chest or
abdomen
Sudden dizziness
Confusion
Severe or persistent
vomiting
Flu-like
symptoms improve but then return
with fever and worse cough