Q. Passive immunization include
A) Transfer of lymphocyte directly
B) Transfer of maternal antibodies across placenta to the foetus
C) Introduction of antibodies
D) Both (b) and (c)
Explanation
Passive immunity results when antibodies are produced by one individual and then acquired by another. The acquisition of the antibodies in colostrum by an infant is an example of (naturally acquired) passive immunity; the crossing of the placenta by maternal antibodies is another example of naturally acquired passive immunity
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.