Question

Which of the following type of immunity is present at the time of birth and is a non-specific type of defence in the human body?

Options

• Acquired immunity

• Innate immunity

• Cell-mediated immunity

• Humoral immunity

Answer 1

Innate immunity

Explanation:

The first line of defence that exists from birth is innate immunity. It consists of cellular defences (macrophages), chemical barriers (stomach acid), and physical barriers (skin). It acts in the same way against all infections, making it non-specific. On the other hand, acquired immunity is specific to certain infections and develops through exposure after birth.