As you grow older, your immune system does not work as well.
If you take a medication that suppresses your immune system you become more likely to get sick.
What is an immunosuppressive drug and why would you take one?
Immunosuppressants are drugs that deliberately weaken your immune system. A person might be on these if they have
Primary immunodeficiency disorders are ones you are born with.
Specific kinds of primary immune deficiency disorders and their effects are listed here:
Secondary immunodeficiency disorders are acquired. They are not the result of birth, but of other circumstances.
Caused by medications:
These are often the effects of specific medications that temporarily suppress or permanently damage the immune system (e.g. chemotherapy). Immune deficiency also occurs when the spleen is removed, since the spleen is an important immune system organ.
Caused by acquiring other diseases:
Another cause of acquired immune deficiency disorders are diseases such as chickenpox, lupus, mono, tuberculosis, Severe Acute Respiratory Syndrome (SARS) and Acquired Immune Deficiency Syndrome (AIDS) caused by the Human Immunodeficiency Virus (HIV). Because of the potentially severe consequences of these diseases, children are given vaccines against them when possible.
Caused by malnutrition:
Severe malnutrition is also known to lead to acquired immune deficiency (e.g. digestive tract paralysis diseases).
SHOUTOUT to Creakyjoints.org and their Q&A between immunocompromised patients and physicians. https://creakyjoints.org/living-with-arthritis/coronavirus-questions-immunocompromised-patients/