What do you mean by disease symptoms? Explain by giving two examples.

(N/A) When the functioning or the appearance of one or more systems of the body changes for the worse,it produces certain abnormal signs of the disease. These visual or felt changes in human beings are called symptoms. Symptoms provide an indication of the presence of a particular disease.
Example $(i)$: Lesions on the skin are symptoms of chickenpox.
Example $(ii)$: Cough is a symptom of a lung infection.