Which of the following diagnostic tests is commonly used to assess immune function in individuals suspected of having an immunodeficiency disorder?

Explanation: The correct answer is b. Common variable immunodeficiency (CVID). CVID is an example of a primary immunodeficiency disorder, which is typically caused by genetic mutations affecting the immune system's development and function.

Incorrect choices:

a. Human immunodeficiency virus (HIV) infection is an example of a secondary immunodeficiency disorder, which occurs due to an external factor, such as a viral infection, damaging the immune system.

c. Rheumatoid arthritis is an autoimmune disorder that affects the joints and is not classified as an immunodeficiency disorder.

d. Diabetes mellitus is a metabolic disorder involving insulin production and does not directly affect the immune system's function.

Explanation: The correct answer is c. Ensuring the client receives antiretroviral therapy (ART) as prescribed. ART is the mainstay of treatment for HIV infection and is essential for suppressing viral replication, improving immune function, and preventing disease progression.

Incorrect choices:

a. Encouraging strenuous physical activities is not recommended for clients with HIV infection, as it may place additional stress on the immune system and exacerbate symptoms.

b. While a balanced diet is essential for overall health, there is no specific evidence that a diet high in raw fruits and vegetables alone can boost the immune system sufficiently to manage HIV infection.

d. Clients with HIV infection should follow infection control precautions to prevent the transmission of the virus to others. Interacting freely with other clients may put them and others at risk of infection transmission.