Precaution
Prior anaphylaxis with alum or 2-phenoxyethanol; acute severe or moderate illness; produces protective antibody in only 67% of older adults.
Administration
Single-antigen formulations require a 2-dose schedule. With combined hepatitis A and B vaccine, administer 3 doses according to product instructions.
For International Travel
Countries with relevant endemic diseases can be identified at http://www.cdc.gov/travel/contentdiseases.aspx.