Читать книгу Principles of Virology - Jane Flint, S. Jane Flint - Страница 72

Organisms have many physical barriers to protect themselves from dangers in their environment, such as invading parasites. Vertebrates also possess an immune system to defend against anything recognized as foreign. Studies of the interactions between viruses and the immune system are particularly instructive, because of the many viral countermeasures that can frustrate this system. Elucidation of these measures continues to teach us about the basis of immunity (Volume II, Chapters 2 to 4).