Microbe Innate immunity Adaptive immunity I B lymphocytes Epithelial 薄 Antibodies barriers 真 ③ Phagocytes T lymphocytes Effector T cells 参 Complement NK cells Hours Days 6 Time after infection Abbas et al: Cellular and Molecular Immunology, Updated 6th Edition. opyright 2009 by Saunders, an imprint of Elsevier, Inc. All rights reserved