An efficacy may pertain-to a covenant.Logical formLearned from2 sentences. An efficacy may pertain-to nematodes.Logical formLearned from2 sentences. Persons may have (efficacy data).Logical formLearned from2 sentences. (Efficacy trials) may pertain-to persons.Logical formLearned from2 sentences. Use of (zinc sulfate) may increase an efficacy.Logical formLearned from2 sentences. An information can be on efficacy.Logical formLearned from2 sentences. Efficacy may be documented.Logical formLearned from2 sentences. An efficacy of treatment can be established.Logical formLearned from2 sentences. Measures can be constituted-of-or-filled-with efficacy.Logical formLearned from2 sentences. (Pertussis vaccines) may have efficacy.Logical formLearned from2 sentences. An efficacy can be in an (age group).Logical formLearned from2 sentences. Efficacy can be at a dose.Logical formLearned from2 sentences. An efficacy can be against disease.Logical formLearned from2 sentences. An efficacy may pertain-to filters.Logical formLearned from2 sentences. A (vaccine efficacy) can be decreased.Logical formLearned from2 sentences.