what happens in our 3rd line of defence

Question 1

antigens

Answer 1

found on the surface of pathogens, our body recognises them as foreign and activates B cells to kill them.

Question 2

antibodies

Answer 2

Proteins respond to the antigens and destroy the pathogens.

Question 3

Immune response

Answer 3

T cells and phagocytes that are released in response to an antigen. T cells act against viruses.