An efficacy may pertain-to interventions.Logical formLearned from55 sentences. An efficacy can be reduced.Logical formLearned from55 sentences. An efficacy may pertain-to a vaccine.Logical formLearned from55 sentences. An efficacy may pertain-to methods.Logical formLearned from54 sentences. Efficacy may undergo a loss.Logical formLearned from49 sentences. An efficacy may pertain-to measures.Logical formLearned from48 sentences. An efficacy may pertain-to a technique.Logical formLearned from48 sentences. An efficacy may pertain-to programs.Logical formLearned from47 sentences. An efficacy may pertain-to a procedure.Logical formLearned from47 sentences. An efficacy can be true.Logical formLearned from47 sentences. An efficacy can be perceived.Logical formLearned from46 sentences. An efficacy may pertain-to efforts.Logical formLearned from45 sentences. A lack can be constituted-of-or-filled-with efficacy.Logical formLearned from43 sentences. A measure can be constituted-of-or-filled-with efficacy.Logical formLearned from43 sentences. An efficacy can be contraceptive.Logical formLearned from43 sentences.