What is Herd Immunity? #shorts

What is active immunity?

What is passive immunity?

What is innate immunity? Mention any two types of innate immunity barriers.

What is acquired immunity? Give a brief account on the cells involved in acquired immunity.

" What is immunity ? Mention their type. "

What is passive immunity? Give its two examples.

Assume a population that has reached herd immunity for an infectious disease. If an infected individual is introduced to this population. Which of the following is most likely to occur?