Hepatitis A Vaccine Uses Side Effects Dosage Precautions
There are three different hepatitis A vaccines approved by the Food and Drug Administration (FDA): Havrix, approved for use in 1995Vaqta, approved for use in 1996Twinrix (hepatitis A and B vaccine), approved for use in 2001 Both Havrix and Vaqta are delivered by injection in two doses and are equally effective in preventing hepatitis A infection. They can be used interchangeably. Twinrix requires three to four doses. Hepatitis A vaccines are inactivated vaccines, meaning that they contain dead hepatitis A viruses that cannot cause disease but can still provoke an immune response....