Recent surveys found that an increasing number of parents are concerned that infants receive too many vaccines. Implicit in this concern is that the infant’s immune system is inadequately developed to handle vaccines safely or that multiple vaccines may overwhelm the immune system. In this review, we will examine the following: 1) the ontogeny of the active immune response and the ability of neonates and young infants to respond to vaccines; 2) the theoretic capacity of an infant’s immune system; 3) data that demonstrate that mild or moderate illness does not interfere with an infant’s ability to generate protective immune responses to vaccines; 4) how infants respond to vaccines given in combination compared with the same vaccines given separately; 5) data showing that vaccinated children are not more likely to develop infections with other pathogens than unvaccinated children; and 6) the fact that infants actually encounter fewer antigens in vaccines today than they did 40 or 100 years ago.
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January 2002
Special Article|
January 01 2002
Addressing Parents’ Concerns: Do Multiple Vaccines Overwhelm or Weaken the Infant’s Immune System?
Paul A. Offit, MD;
Paul A. Offit, MD
*Section of Infectious Diseases, Children’s Hospital of Philadelphia, University of Pennsylvania School of Medicine, and Wistar Institute of Anatomy and Biology, Philadelphia, Pennsylvania
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Jessica Quarles;
Jessica Quarles
‡Division of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
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Michael A. Gerber, MD;
Michael A. Gerber, MD
§National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
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Charles J. Hackett, PhD;
Charles J. Hackett, PhD
∥Division of Allergy, Immunology, and Transplantation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
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Edgar K. Marcuse, MD;
Edgar K. Marcuse, MD
¶Section of Infectious Diseases, Children’s Hospital and Regional Medical Center, University of Washington School of Medicine, Seattle, Washington
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Tobias R. Kollman, MD;
Tobias R. Kollman, MD
#Department of Pediatrics, University of Washington School of Medicine, Department of Epidemiology, University of Washington School of Public Health and Community Medicine, and Children’s Hospital and Regional Medical Center, Seattle, Washington
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Bruce G. Gellin, MD;
Bruce G. Gellin, MD
**Department of Preventive Medicine, Vanderbilt Medical College, Nashville, Tennessee
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Sarah Landry
Sarah Landry
‡Division of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
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Reprint requests to (P.A.O.) Children’s Hospital of Philadelphia, Abramson Research Building, Room 1202C, 3516 Civic Center Blvd, Philadelphia, PA 19104. E-mail: offitemail.chop.edu
Pediatrics (2002) 109 (1): 124–129.
Article history
Received:
August 07 2001
Accepted:
October 04 2001
Citation
Paul A. Offit, Jessica Quarles, Michael A. Gerber, Charles J. Hackett, Edgar K. Marcuse, Tobias R. Kollman, Bruce G. Gellin, Sarah Landry; Addressing Parents’ Concerns: Do Multiple Vaccines Overwhelm or Weaken the Infant’s Immune System?. Pediatrics January 2002; 109 (1): 124–129. 10.1542/peds.109.1.124
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