1. Name two types of cell that help the immune system
- lymphocytes and phagocytes
- white blood cell
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2. What is a pathogen
- Something that spreads disease
- A pathogen is a microbe that causes disease
3. What is a vaccine
- A vaccine is weak or dead form of a pathogen which is inserted into the body for immunity to that pathogen.
4. How do viruses make one feel ill?
- Viruses invade body cells and burst them
- Release toxins
- Reproduce rapidly
5. How do bacteria make one feel ill?
- Burst cell
- Release toxins which poison the body and reproduce rapidly.
- Invade body cells