By the end of this lesson, you'll solve:
"Malaria kills over 600,000 people worldwide every year. How does a tiny mosquito cause so much damage?"
How Diseases Spread
Communicable diseases are caused by pathogens (germs) that can pass from one person to another through various routes.
Key Points
- 1Air-borne: TB, common cold, COVID — spread by coughing/sneezing
- 2Water-borne: cholera, typhoid, hepatitis A — spread by contaminated water
- 3Vector-borne: malaria (mosquito), plague (flea), rabies (dog bite)
- 4Contact: ringworm, scabies, conjunctivitis — spread by touching
- 5Pathogen types: bacteria (TB), virus (dengue), protozoa (malaria), fungi (ringworm)
Pro Tip
Remember "ABCV" for spread routes: Air, Body-contact, Contaminated water/food, Vectors.
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