Which one of the following is an example of innate or natural immunity?
A. Natural recovery by crisis in pneumococcal pneumonia
B. Neonatal immunity to haemophilus meningitis
C. Prophylactic immunization with diphtheria toxoid
D. Protection afforded by tetanus antitoxin
E. Resistance in early stages of a primary infection.

hena Asked question August 8, 2021