Efficacious : (ef-uh-KAY-shus) a formal adjective used to describe something — often a treatment, medicine or remedy — that has the power to produce a desired result or effect. "Scientific …
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Efficacious: (ef-uh-KAY-shus) a formal adjective used to describe something — often a treatment, medicine or remedy — that has the power to produce a desired result or effect.
"Scientific studies have found COVID-19 vaccinations are 80-90% efficacious at preventing symptomatic and asymptomatic infections."