According to the Health Canada website - the period of protection is not known since since the Hep B vaccine is only 20 years old. In regions where Hepatitis B is common, immunized patients have demonstrated protective levels of antibodies 15 years following their immunization shots.
Hepatitis A vaccine has been around for 14 years - and again they are not sure how long protection lasts - but the thinking is that it may last up to 20 years.
Hepatitis A vaccine has been around for 14 years - and again they are not sure how long protection lasts - but the thinking is that it may last up to 20 years.
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