Final answer:
The statement is false. A sick person does not lose the right to perform the sick role if they fail to follow the professional's instructions.
Step-by-step explanation:
The statement that 'If a sick person fails to follow the professional's instructions, he or she again loses the right to perform the sick role' is False.
According to sociologist Talcott Parsons, the sick person has a specific role with rights and responsibilities. While the sick person is exempt from normal social roles and not responsible for their condition, it is expected that they try to get better and seek competent help from a physician.
The exemption from normal roles is temporary and relative to the severity of the illness, and it requires legitimation by a physician. However, the failure to follow the professional's instructions does not automatically revoke the right to perform the sick role. Instead, it may lead to social consequences such as stigmatization.