Describe the 6 phases of developing a vaccine

Exploratory stage

Pre-clinical stage

Clinical development

Regulatory review and approval

Manufacturing

Quality control

Explanation:

Internet

Explanation:

there are many stages to a vaccine

many come from ... developing symptoms

in which some case can come from

some quality control, pre-clinical control or even exploratory stage

your the dumbest b**tch ive ever seen

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.