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.
(plural flaws) 1  A crack or breach, a gap or fissure; a defect of continuity or cohesion. 2  A defect, fault, or imperfection, especially one that is hidden. 3  A defect or error in a contract or other document which may make the document invalid. a flaw in a will, in a deed, or in a statute.