Antigens?
Trigger the production of anti-bodies
Trigger the production of more antigens
Trigger the production of red blood cells
Trigger the production of white blood cells

Trigger the production of anti-bodies.

Explanation:

Antigens are the substances, may be virus, bacteria, fungi which can cause infection. In response to this, Antibodies are produced stimulated by immune system.

For e.g. if a blood group of person is A, the cells contain A antigen on it. So it having anti-B antibodies.

communicate with the patient and explain every step before proceeding to do so

answer: every other day

explanation: because you don't want to over work your body and especially if your just starting to work out.