Which of the following factors were not explored in this lesson’s lab experiment?

Check all that apply.
A. the number of people in a population
B. the initial health of the individuals
C. the method of transmission
D. the low chances of a disease being passed on contact
E. the effect interacting with the same individuals over and over again
F. the immunity rate

All of them except the immunity rate, F.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.