Question

Infection is said to occur when:

विकल्प

• Harmful organisms called pathogens invade the body and begin to reproduce

• Nutrients fail to be absorbed in the intestine

• The body produces antibodies against its own cells

• Body temperature falls below the normal range

Answer 1

Infection occurs when harmful organisms called pathogens invade the body and begin to reproduce. This multiplication of pathogens inside the body is what leads to the development of disease.