Immune responses can be to a (parasite burden).Logical formLearned from4 sentences. Immune systems may do jobs.Logical formLearned from4 sentences. A person may build_up an immune system.Logical formLearned from4 sentences. An immune system may attack (blood cells).Logical formLearned from4 sentences. (Fighting cells) can be immune.Logical formLearned from4 sentences. An immune response can be to intestinal bacteria.Logical formLearned from4 sentences. An immune response can be overzealous.Logical formLearned from4 sentences. A person can be immune to drugs.Logical formLearned from4 sentences. Immune function may undergo an enhancement.Logical formLearned from4 sentences. A viral mutation may evoke a response from an immune system.Logical formLearned from4 sentences. Challenges can be to an immune system.Logical formLearned from4 sentences. An immune system can be male.Logical formLearned from4 sentences. A person can be immune to a person.Logical formLearned from4 sentences. An immune system can be under attack.Logical formLearned from4 sentences. An immune system can be anti-aging.Logical formLearned from4 sentences.