The OLD HIB vaccine will temporarily result in a decrease of protective antibodies for 1-2 weeks, leaving the recipient at an increased risk for picking up an HIB infection. In 1994 the Institute Of Medicine revealed that:
|Because immunization with Hib vaccines may lead to a transient decrease in protective antibody levels, unimmunized children at increased risk of colonization (household or day-care contact with individuals with recent cases of Hib infection) may require special [protective] measures." One Hib vaccine manufacturer states, "There have been rare reports to the Vaccine Adverse Events Reporting System (VAERS) of Hib disease following full primary immunization."
They say the new conjugated vaccine will not do this:http://jama.ama-assn.org/cgi/content...ct/271/20/1602
I am not convinced however