Question

6. In a cass, many children are exposed to the two
students suffering cold and cough, but only few
catch the infection, while others do not.
It is because

a) there immunity system fights wards of the infecting agent
b) they have nutritious and high calorific food
c) they live in very big houses and not in crowded places
d) they get safe drinking water ​

Answer 1

Answer:

a) there immunity system fights wards of the infecting agent

Explanation:

Answer 2

Answer:

a) there immunity system fights wards of the infecting agent