The Centers for Disease Control and Prevention (CDC) is a federal agency that conducts and supports health promotion, prevention and preparedness activities in the United States, with the goal of improving overall public health. Established in 1946 and based in Atlanta, the CDC is managed by the Department of Health and Human Services .
Definition of ale. 1  1 : an alcoholic beverage brewed especially by rapid fermentation from an infusion of malt with the addition of hops. 2  2 : an English country festival at which ale is the principal beverage.
So then what really distinguishes an ale from a lager? The difference is yeast. Not whether or not it's used, but the specific type. But from this relatively small variant comes a whole slew of changes and differences that make these two beers very unique. Ales - Ales are brewed with a top-fermenting yeast that thrives at mid-range room temperatures.