The diseases causing microbes are called pathogens.
They enter into the body through -
1. Cuts and wounds in the skin, mouth or nose.
2. Some pathogens are found in air and enter into a healthy person by breathing. When a patient sneezes, droplets containing microbes spread in air.
Example: Tuberculosis, Flu
3. Some pathogens enter into our body through food and water contaminated with the pathogen. Example: Cholera.
4. Pathogens also enter through blood transfusion from a infected to healthy person. Example: Aids
