Immunology
What is a Pathogen ?
Viruses that cause diseases
What is a Leukocytes ?
White blood cells ( Soldiers of the immune system )
How do pathogens spread ?
- Airborne
- contaminated surface
- direct contact
- infected animals
What is Phagocytes ?
They Kill Pathogens
What are Lymphocytes ?
Kill infected cells and secrete germ killing antibodies