Sometimes it might be the full-blown onset of a more critical illness such as schizophrenia.
Most travellers who return with mild respiratory symptoms are likely to have a common illness, such as a cold.
"It has traditionally required a serious mental illness such as psychosis or serious personality disorder to prove insanity.
Even for people with more common types of mental illness, such as depression, only about half are competitively employed.
She accused the NHS of endangering the health of people with severe mental illness, such as schizophrenia.
"The patient might have depression or anxiety, or possibly a more serious mental illness such as schizophrenia.
Half die in hospital, usually with a chronic illness such as heart disease, cancer or stroke.
One rat had obvious clinical signs of illness, such as a hunched posture.
Border agents will check passengers for signs of illness such as high temperatures.
At times, they worried that the headaches were a symptom of serious illness, such as a tumour or a stroke.
More common is organic amnesia, of the kind caused by damage to the brain or neurological illness, such as stroke.
