An international collaborative study (coded BSP083) was performed under the aegis of the Biological Standardisation Programme supported by the Council of Europe and the European Commission, with the aim of replacing the in vivo challenge assays for potency determination of combined acellular pertussis (aP) vaccines by a refined procedure also allowing reduction of animal use. This study investi...

Most hepatitis B (HB) vaccines are based on recombinant major S protein produced and purified from yeast. To decrease the number of vaccinations, several combination vaccines have been developed, and are commonly used for infant [1-3]. These include HB combined with diphtheria, tetanus, acellular pertussis, and inactivated poliovirus vaccine (DTaP–IPV–HB vaccine); combined hepatitis A and HB va...

Given the resurgence of pertussis despite high rates of vaccination with the diphtheria-tetanus-acellular pertussis (DTaP) vaccine, a better understanding of vaccine-induced immune responses to Bordetella pertussis is needed. We investigated the antibody, cell-mediated, and cytokine responses to B. pertussis antigens in children who received the primary vaccination series (at 2, 4, and 6 months...

Pertussis incidence is rising in almost every country where acellular pertussis (aP) vaccines have been introduced, and is occurring across all age groups from infancy to adulthood. The key question is why? While several known factors such as waning of immunity, detection bias due to more sensitive tests and higher awareness of the disease among practitioners, and evolutionary shifts among B. p...

periences gained in the study of DTaP vaccines has led to better laboratory diagnosis of B pertussis infection. In general, B pertussis culture is now performed better, polymerase chain reaction is widely available, and adolescent and adult disease can be diagnosed by single-serum serology. Pertussis will continue to be a problem until we address the epidemiology of B pertussis. The coming avai...

Introduction Pertussis is re-emerging worldwide, despite effective immunization programs for infants and children. Epidemiological studies show a more limited duration of protection against clinical pertussis in adolescents primed with acellular pertussis (aP) vaccines during infancy than those who have been primed with whole-cell pertussis (wP) vaccines. This study aimed to determine whether m...

The resurgence of pertussis in some countries that maintain high vaccination coverage has drawn attention to gaps in our understanding of the epidemiological effects of pertussis vaccines. In particular, major questions surround the nature, degree and durability of vaccine protection. To address these questions, we used mechanistic transmission models to examine regional time series incidence d...

OBJECTIVE To assess the effectiveness of reduced acellular pertussis (Tdap) vaccines in adolescents and adults. SETTING Kaiser Permanente Northern California. DESIGN Case-control study. PARTICIPANTS All polymerase chain reaction (PCR) confirmed cases of pertussis in members aged 11 years and older from January 2006 to December 2011. We compared the Tdap vaccination status of PCR positive ...

The safety and immunogenicity of 5 acellular pertussis vaccines (ACVs) were compared in a multicenter, randomized, double-blind trial. A total of 481 healthy adults were given a single intramuscular booster dose of ACV or placebo. Three different dose levels were tested for 4 ACVs: full strength (the dose level proposed for infant immunization), one-third strength, and one-tenth strength. For 1...