The patient complained of 'sickness' [='nausea'] and stomach pains.
She missed work due to 'sickness'. [='illness']
He died from an unknown 'sickness'.
(..) a mockingbird, wouldn't it? Thank you, Arthur. Thank you for my children. Neighbours bring food with death... and flowers with sickness... and little things in between. Boo was our neighbour. He gave us two soap dolls... a broken watch and chain... a knife... (..)1962 To Kill a Mockingbird