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Published on: February 22, 2019
Review of diphtheria, tetanus and pertussis vaccines in clinical development
1Pfizer Ltd, Vanwall Road, Maidenhead, Berkshire, SL6 4UB, UK. nicholas.kitchin@pfizer.com
Insights
Diphtheria, tetanus, and pertussis vaccines are crucial for child immunization. Current research focuses on combining more vaccines and offering early pertussis protection.
Area of Science:
- Immunology
- Vaccinology
- Pediatric Infectious Diseases
Background:
- Diphtheria, tetanus, and pertussis (DTaP) vaccines are foundational childhood immunizations.
- Historically, DTaP vaccines used inactivated whole-cell pertussis components.
- Recent advancements include purified acellular pertussis vaccines with better safety profiles.
Purpose of the Study:
- To review the evolution of DTaP vaccines.
- To highlight the development of combination vaccines.
- To discuss strategies for early pertussis immunization.
Main Methods:
- Literature review of DTaP vaccine development.
- Analysis of advancements in vaccine formulation.
- Examination of strategies for pre-infant immunization.
Main Results:
- Acellular pertussis vaccines show improved reactogenicity.
- Combination vaccines (DTaP with Hib, HepB, IPV) are increasingly common.
- Focus on early pertussis protection strategies is ongoing.
Conclusions:
- DTaP vaccines have significantly evolved from whole-cell to acellular formulations.
- Combination vaccines enhance immunization efficiency and coverage.
- Future directions aim for broader vaccine combinations and earlier pertussis immunity.
Abstract:
Diphtheria, tetanus and pertussis vaccines have formed the cornerstone of childhood immunization programs for decades. Historically, these have comprised diphtheria and tetanus toxoids combined with inactivated whole-cell pertussis. More recently, advances have been made with the development of purified acellular pertussis vaccines, with improved reactogenicity profiles, and formulation with additional vaccines such as Haemophilus influenzae type b, hepatitis B virus and inactivated poliovirus. Development is currently focused on maximizing the number of vaccines that can be combined in a single formulation and strategies to provide protection against pertussis before the commencement of routine infant immunization.
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