Diseases and immunity
- Pathogens and transmission
- Pathogen
- Disease-causing organism
- Transmissible disease
- Passed between hosts
- Direct contact
- Blood
- Body fluids
- Indirect routes
- Surfaces
- Food
- Animals
- Air
- Body defences
- Skin
- Nose hairs and mucus
- Stomach acid
- White blood cells
- Controlling spread Supplement
- Clean water
- Food hygiene
- Personal hygiene
- Waste and sewage
- Pathogen
- ImmunitySupplement
- Active immunity Supplement
- Own antibodies
- Infection
- Vaccination
- Active immunity Supplement