An efficacy may pertain-to an action.Logical formLearned from6 sentences. An efficacy can be in reducing a risk of infection.Logical formLearned from6 sentences. An efficacy may pertain-to an ordinance.Logical formLearned from5 sentences. An improvement can be in efficacy of artillery.Logical formLearned from5 sentences. An efficacy may pertain-to water.Logical formLearned from5 sentences. A (response efficacy) can be perceived.Logical formLearned from5 sentences. An efficacy may pertain-to prayer.Logical formLearned from5 sentences. Emphasis can be on an efficacy of ritual.Logical formLearned from5 sentences. An efficacy may pertain-to a policy.Logical formLearned from5 sentences. A male may believe in an efficacy of prayer.Logical formLearned from5 sentences. Evidence can be on efficacy.Logical formLearned from5 sentences. Evidence can be for an efficacy.Logical formLearned from5 sentences. An efficacy may pertain-to a substance.Logical formLearned from5 sentences. Luminous efficacy can be constituted-of-or-filled-with radiation.Logical formLearned from5 sentences. Efficacy may pertain-to a therapy.Logical formLearned from5 sentences.