bone

marrow

immune

system

disease

treat

thymus

antibodies

active

passive

immunity

autoimmunity

macrophage

blood

cell

health

service

complement

lymphatic

hypersensitivity

immunodeficiencies

human

innate

spleen

organ

white

fibroblast

digestive

tract

defense

lungs

body

skin

function

medical

healthcare

plasma

cellular

biology

microbiology

icon

motion

animation

hd

animated