Merck Voluntarily Recalls Lots of Pediatric Vaccines

Merck has begun a voluntary recall of certain lots of Pedvaxhib, its Haemophilus influenzae Type B vaccine, and two lots of Comvax, its combination Haemophilus influenzae Type B-hepatitis B vaccine. 

The recall is specific to these lots, which were distributed starting in April, and does not affect any other vaccines manufactured by Merck. 

Merck is conducting this recall because it cannot assure sterility of these lots. However, sterility tests have not found any contamination in the vaccine, according to the company.