A person who has recovered from attack of measles develops ------------------ immunity to measles, for the life time.

When a person is exposed to a live pathogen, develops the disease, and becomes immune as a result of the primary immune response, it is called naturally acquired active immunity.

Measles infection is a natural event, and the body's immune system actively produces antibodies and memory cells against the measles virus.

This provides lifelong immunity to the person. Thus, the immunity developed is natural acquired active immunity.

Answer: natural acquired active