OBJECTIVE To evaluate the immunogenicity and reactogenicity of an acellular pertussis vaccine (pa) either formulated with diphtheria and tetanus toxoids (dTpa) or administered consecutively with a licensed tetanus and diphtheria vaccine (Td) as a 5th dose in adolescents. METHODS A total of 510 healthy children 10 to 13 years of age were assigned randomly, using a single-blind design, to recei...

BACKGROUND Because adolescents and adults act as a primary source of pertussis infection for infants, vaccination of mothers immediately postpartum is a potential strategy to reduce transmission (cocoon strategy). For this to be effective, high levels of antibodies must be achieved rapidly after vaccination. We sought to determine whether the antibody response to tetanus-diphtheria-acellular pe...

Tetanus is uncommon in Korea due to the introduction of vaccination programs and advances in public health. A case of maternal tetanus occurred on the 9 day postpartum in a 29-yr-old woman, who had not received a 10-yr-booster of tetanus-diphtheria toxoid after receiving the primary series of tetanus-toxoid-containing vaccine. There has hitherto been no reports on maternal tetanus in Korea. Thi...

Editorial When a disease-causing microorganism passes through the body, causes disease, and then recovery occurs from the disease, protective immunity is gained against the disease. A vaccine is a biological preparation containing artificially made protective immunity. Historically, through the use of these vaccines, humans were able to gain freedom from many kinds of dangerous infectious disea...

Blood samples were obtained from school entrants whose primary immunization schedule had consisted of three doses of DT or DTP vaccine and three doses of OPV all given before the age of 8 months. The sera were separated and assayed for diphtheria antitoxin, tetanus antitoxin and antibodies to the three serotypes of poliovirus. The results of the assays showed that the abbreviated three dose sch...

OBJECTIVE Data on the effectiveness of the diphtheria-tetanus-acellular pertussis (DTaP) vaccine in the first 4 years of life are sparse. We evaluated the vaccine effectiveness (VE) of 1 and 2 doses of DTaP before 6 months of age and of 3 doses from 6 months of age in Australia, where, since 2003, a fourth dose is not given until 4 years. METHODS We matched reported pertussis cases aged 2 to ...

OBJECTIVE The American Academy of Pediatrics recommends immunization of preterm infants at 2 months' chronological age with diphtheria-tetanus-acellular pertussis vaccine, regardless of birth weight and gestational age. Several investigators have reported an increased incidence of cardiorespiratory events in preterm infants after immunization. Consequently, many primary care providers do not ad...

Currently, there are three Hib conjugate vaccines licensed in Canada for use in infants 2 months of age and older. The Bureau of Biologics recently approved two new vaccine products that allow single-needle administration of (a) polyribose ribitol phosphate-tetanus toxoid (PRP-T) with diphtheria toxoid-pertussis vaccine-tetanus toxoid-inactivated poliovirus vaccine (DPT-IPV), and (b) oligosacch...

On February 12, 2009, the US Court of Federal Claims issued a trio of long-awaited decisions in its Omnibus Autism Proceeding.1 The 3 were representative cases chosen from more than 5500 pending MMR/autism cases by the Plaintiffs’ Steering Committee. Each presented the theory that the measles-mumps-rubella (MMR) vaccine in combination with thimerosal, a mercury-based ingredient contained in som...

BACKGROUND Although 93% of 12- to 23-month-old children in India receive at least one vaccine, typically Bacillus Calmette-Guérin, only 75% complete the recommended three doses of diphtheria-pertussis-tetanus (DPT, also referred to as DTP) vaccine. Determinants can be different for nonvaccination and dropout but have not been examined in earlier studies. We use the three-dose DPT series as a pr...