A country can be immune from attack.Logical formLearned from11 sentences. An immune system may eliminate a virus from a system.Logical formLearned from11 sentences. A vaccine may provoke an immune response.Logical formLearned from11 sentences. Immune systems can be developed.Logical formLearned from11 sentences. An immune system can be crippled.Logical formLearned from11 sentences. A status may pertain-to an immune system.Logical formLearned from11 sentences. A boost can be to an immune system.Logical formLearned from11 sentences. Antibodies may be made by an immune system.Logical formLearned from11 sentences. A president can be immune from civil suits.Logical formLearned from11 sentences. An immune system may reject skin.Logical formLearned from11 sentences. An immune system can be tolerant.Logical formLearned from11 sentences. Infection may weaken an immune system.Logical formLearned from11 sentences. Activities can be immune.Logical formLearned from11 sentences. Immune responses can be abnormal.Logical formLearned from11 sentences. An immune system may make proteins.Logical formLearned from11 sentences.