Here's a short story:

Immunology is a branch of biomedical science that covers the study of immune systems in all organisms. It charts, measures, and contextualizes the: physiological functioning of the immune system in states of both health and diseases; malfunctions of the immune system in immunological disorders (such as autoimmune diseases, hypersensitivities, immune deficiency, and transplant rejection); the physical, chemical and physiological characteristics of the components of the immune system in vitro, in situ, and in vivo. Immunology has applications in numerous disciplines of medicine, particularly in the fields of organ transplantation, oncology, virology, bacteriology, parasitology, psychiatry, and dermatology. 

Prior to the designation of immunity from the etymological root immunis, which is Latin for "exempt"; early physicians characterized organs that would later be proven as essential components of the immune system. The important lymphoid organs of the immune system are the thymus and bone marrow, and chief lymphatic tissues such as spleen, tonsils, lymph vessels, lymph nodes, adenoids, and liver. When health conditions worsen to emergency status, portions of immune system organs including the thymus, spleen, bone marrow, lymph nodes and other lymphatic tissues can be surgically excised for examination while patients are still alive. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: Can some tissue be examined while the patients are still alive?
Guess: Yes

Question: What is immunology a branch of?
Guess: Biomedical science

Question: Does it only study immune systems in humans?
Guess: No

Question: How many organisms does it cover?
Guess: All organisms

Question: What states of the immune system does it chart?
Guess: Health and diseases

Question: What kind of functioning might it measure?
Guess: Physiological functioning

Question: What's an example of an immunological disorder?
Guess: Autoimmune diseases

Question: Is the immune system working as intended when someone has that?
Guess: unknown

Question: What's another example of an immunological disorder?
Guess: Hypersensitivities

Question: How can a lymph node be excised?
Guess: Surgically

Now answer the following question in the same format.

Question: Is the thymus an immune system organ?

Yes