The patient complained of 'sickness' [='nausea'] and stomach pains.
She missed work due to 'sickness'. [='illness']
He died from an unknown 'sickness'.
(..) Coulson, you know that Stark trusts me about as far as he can throw me. I've got Stark. You get the big guy. Who are you? Get out! There is sickness here! You're a doctor. My father's not waking up! He has a fever and he's moaning but his eyes won't open. Slow down. (..)2012 The Avengers