What is in twinrix vaccine?
Twinrix vaccine contains both recombinant proteins and killed virus. Each Twinrix dose, for those 19 and over, contains 20 μg (micrograms) of purified hepatitis B surface antigen (HBsAg) protein and 720 ELISA units of inactivated hepatitis A viral antigen (HM 175 strain) in 1 mL. (The Twinrix Junior dose has less) There are no adjuvants and phenoxy ethanol is used in microscopic amounts as a preservative to prevent contamination. Potential allergens include (things that could cause an allergic reaction…