Merck has initiated a voluntary recall of 11 lots of its Haemophilus influenzae type B vaccine, PEDVAXHIB, and two lots of its combination Haemophilus influenzae type B/ hepatitis B vaccine, COMVAX . The recall is specific to these 13 lots and does not affect any other vaccines manufactured by Merck. The affected doses of PEDVAXHIB and COMVAX were distributed starting in April 2007. The company is conducting this recall because it can not assure sterility of these specific vaccine lots. Routi...