An immune system may react to a stimulus.Logical formLearned from4 sentences. A notion may pertain-to an immune system.Logical formLearned from4 sentences. An immune system may react to bacteria.Logical formLearned from4 sentences. A theory of an immune system may remain secure.Logical formLearned from4 sentences. Some substances may induce an immune response.Logical formLearned from4 sentences. An immune system may kill_off lymphocytes.Logical formLearned from4 sentences. An immune system may shift to a mode.Logical formLearned from4 sentences. Immune cells may be weed_outed.Logical formLearned from4 sentences. Immune cells can be self-destructive.Logical formLearned from4 sentences. A result can be constituted-of-or-filled-with weakened immune systems.Logical formLearned from4 sentences. (Blood levels) can be constituted-of-or-filled-with immune cells.Logical formLearned from4 sentences. Homespun can be immune from changes.Logical formLearned from4 sentences. A person can be immune to a virus.Logical formLearned from4 sentences. Public opinion can be immune to arguments of necessity.Logical formLearned from4 sentences. An immune system may succumb to stress.Logical formLearned from4 sentences.