Zoology - Human Health and Diseases Question with Solution | TestHub

In higher vertebrates, the ability to differentiate foreign organisms like pathogens from self cells is observed and this is the basis of an immune response. Sometimes, due to genetic and other unknown reasons, the body attacks self-cells. This results in damage to the body and is called auto-immune disease. Rheumatoid arthritis which affects many people in our society is an auto-immune disease.