What can affect the immune system?
pathogens Pesticides dirt chickenpox Allergies viruses odors pollution
A B C D E F G H
The disease affects the immune system.
pathogens affects the immune system.
What can affect the immune system? (A) pathogens (B) Pesticides (C) dirt (D) chickenpox (E) Allergies (F) viruses (G) odors (H) pollution