set of cells of the immune system. white blood cells. transparent realistic cells on a dark background

adaptive anatomy antibody antigen background basophil bcell biology black blood blue care cell cells collection dark dendritic diagram disease eosinophil fibroblast health healthcare helper human illustration immune immunity immunology infection inflammation innate killer leukocyte lymphocyte lymphoid macrophage medical medicine natural neutrophil nkcell realistic response science set structure system tcell transparent vector virus white