Fact 1: Antigens are molecules that the immune system recognizes as foreign to the body. Fact 2: Antibodies are produced to fight antigens. Given the two facts above, answer the question "What happens when the immune system recognizes a foreign substance?" with the following options: - an area swollen with pus - The immune system fails - irradiation - Bacteria dies - Antibodies are formed - major threat to health - Something that causes allergies - Viruses reproduce
The answer to this question is:
Antibodies are formed