http://www.cdc.gov/vaccines/vac-gen/shortages/default.htm
In December 2008, Merck communicated with CDC that it expected to deplete available adult and dialysis formulations of their hepatitis B vaccine, Recombivax HB® in the first quarter of 2009. Once depleted, these formulations will be unavailable for the remainder of 2009. Supply of GSK's Adult hepatitis B vaccine (Adult Engerix-B®) and Adult hepatitis A/hepatitis B combination vaccine (Twinrix®) is sufficient to meet demand for routine adult usage of this vaccine as well as CDC's ongoing High Risk Adult Hepatitis B Initiative.
