What is the potential severity of the illnesses you are most susceptible to

This occurs when your immune system is low and weakened.

Explanation:

The immune system is a set of elements in the human body. These elements interact with each other and aim to defend the body against disease, viruses, bacteria, microbes and others. The human immune system serves as a shield, shield or barrier that protects us from unwanted beings, the antigens, that try to invade our body. Thus, it represents the defense of the human body.

As for the immune system, we can say that the potential severity of the diseases to which you are most susceptible is related to the moment your immune system is low. This will weaken your body's defense, so it will be easier for you to become infected with the disease.