An explanation may begin with an immune system.Logical formLearned from6 sentences. An immune system may get a message.Logical formLearned from6 sentences. A (chemical messenger) can be in an immune system.Logical formLearned from6 sentences. A general can be immune from prosecution.Logical formLearned from6 sentences. An immune system may fight an infection.Logical formLearned from6 sentences. An immune response can be in humans.Logical formLearned from6 sentences. An immune system may attack (cancer cells).Logical formLearned from6 sentences. (Killer cells) may pertain-to an immune system.Logical formLearned from6 sentences. Milkmaids can be immune to smallpox.Logical formLearned from6 sentences. Immune cells can be in (lymph nodes).Logical formLearned from6 sentences. Receptors may pertain-to an immune cell.Logical formLearned from6 sentences. A person can be on immune cells.Logical formLearned from6 sentences. A feature may pertain-to an immune system.Logical formLearned from6 sentences. Markets can be immune to domination.Logical formLearned from6 sentences. Immune cells may function.Logical formLearned from6 sentences.