Any subjective evidence of disease. In contrast, a sign is objective. Blood coming out a nostril is a sign; it is apparent to the patient, physician, and others. Anxiety, low back pain, and fatigue are all symptoms; only the patient can perceive them.
Maybe the paper A has more evidence and more detail than aper b
Colonial Brazil was ruled by Portugal.
Hope this helps.
It is a microscope small enough to see atoms.