GENERIC NAME: hepatitis A vaccine. DRUG CLASS AND MECHANISM: Hepatitis A vaccine (Havrix, Vaqta) is used to prevent hepatitis A, a type of liver disease that is caused by the hepatitis A virus (HAV).epatitis A vaccine was approved in 2005. PRESCRIBED FOR: Hepatitis A vaccine is used to prevent hepatitis A. Hepatitis A vaccine can be used in persons 1 year of age and older. Although anyone can be infected with hepatitis A, certain people are at high risk and should be routinely vaccinated.
A deficiency is generally a lack of something. It may also refer to: 1  A deficient number, in mathematics, a number n for which Ï (n n. 2  Angular deficiency, in geometry, the difference between a sum of angles and the corresponding sum in a Euclidean plane.
color vision deficiency see color vision deficiency. deficiency disease a condition due to dietary or metabolic deficiency, including all diseases caused by an insufficient supply of essential nutrients.iron deficiency deficiency of iron in the system, as from blood loss, low dietary iron, or a disease condition that inhibits iron uptake.See iron and iron deficiency anemia.olor vision deficiency see color vision deficiency. deficiency disease a condition due to dietary or metabolic deficiency, including all diseases caused by an insufficient supply of essential nutrients.