An efficacy may pertain-to (air attacks).Logical formLearned from2 sentences. Questions can be about an efficacy of (air attacks).Logical formLearned from2 sentences. Testimony can be to an efficacy of a (treatment system).Logical formLearned from2 sentences. A study can be on an efficacy of (drug treatment program).Logical formLearned from2 sentences. Economists may question an efficacy of aid.Logical formLearned from2 sentences. (Analog reverse transcriptase inhibitor preliminary studies) may suggest efficacy.Logical formLearned from2 sentences. An efficacy may pertain-to a privilege.Logical formLearned from2 sentences. An efficacy may pertain-to a vaccine.Logical formLearned from2 sentences. Supplies can be of efficacy.Logical formLearned from2 sentences. A drug may improve an efficacy of (organ transplantation).Logical formLearned from2 sentences. A (vaccine efficacy) can be solid.Logical formLearned from2 sentences. Trials may test an efficacy.Logical formLearned from2 sentences. Faith can be in an efficacy of some institutions.Logical formLearned from2 sentences. An efficacy can be debatable.Logical formLearned from2 sentences. An efficacy may pertain-to a thinking.Logical formLearned from2 sentences.