What is the job of our immune system?

What causes inflammation?

What is the function of white blood cells?

What do different types of white blood cells do?

What are antibodies?

What do antibodies do?

What is pus made of?

What are antigens?

What are receptors & where are they found?

Why does your body have to make different antibodies for different pathogens?

What is immunity?

Why can you get some diseases more than once?