Explanation:
According to Parson's theory, illness is a deviance from normal. Because for a functional society health is always necessary. So according to him a person who had fallen ill is in a 'sick role'. A person in a sick role has certain rights and obligations.
The four famous postulates of Parson himself are:
Thus from the fourth postulate itself it is clear that the role of medicine in society is to get a person out of a sick role which is a deviant behavior.
