Video Vaccine FAQs

To address many of the concerns that people have about vaccines and their safety, ECBT posed some frequently-asked questions to several experts in the fields of immunization and autism and put their replies to the questions in a video format. Click on the videos below to view experts answers to parents’ most common questions.

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Why Vaccinate?

Why do children need so many vaccines? [:59]

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Are my children really in danger of becoming seriously ill if I don’t have them vaccinated? [:50]

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How do you feel about chickenpox parties? [1:32]

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Many vaccines are for diseases that don’t appear to exist anymore. Why is it important to vaccinate against them? [1:52]

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Why Follow the Recommended Immunization Schedule?

Why is it necessary to vaccinate infants who are so young? [:50]

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Is it safe for a child to receive multiple vaccinations during a single office visit? [:44]

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Are we overwhelming the immune system by giving too many vaccines? [1:05]

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How do they determine the ages when children should receive each vaccine? Is it okay to delay vaccines? [1:05]

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What if I elect not to vaccinate my children? [1:53]

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Vaccine Testing, Ingredients & Safety

Are vaccines safe? [1:14]

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What sort of testing goes on before and after a vaccine is given to a child? [1:46]

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I’ve heard there are ingredients in vaccines that can harm children. Is this true? [:27]

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Is there mercury (thimerosal) in vaccines? Is that dangerous? [1:02]

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Can you explain why adjuvants, like aluminum, are in some vaccines? [:34]

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Should I be concerned about combination vaccines? [:36]

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What does it mean to “green” a vaccine? [1:19]

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Vaccines and Autism

Do vaccines cause autism? [1:34]

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What sort of research has been done to ensure that vaccines and autism are not related? [1:11]

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We’re seeing more vaccines being given and more children are being diagnosed with autism. What’s going on? [1:08]

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If I already have a child who is autistic, should I play it safe and not vaccinate my younger child? [1:50]

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​Meet Our Experts





Paul A. Offit, MD
Chief, Division of Infectious Diseases & Director, Vaccine Education Center
Children’s Hospital of Philadelphia

Dr. Paul Offit is Chief of the Division of Infectious Diseases and Director of the Vaccine Education Center at the Children’s Hospital of Philadelphia. In addition, Dr. Offit is the Maurice R. Hilleman Professor of Vaccinology and a Professor of Pediatrics at the University of Pennsylvania School of Medicine.

He is a recipient of many awards including the J. Edmund Bradley Prize for Excellence in Pediatrics from the University of Maryland Medical School, the Young Investigator Award in Vaccine Development from the Infectious Disease Society of America, and a Research Career Development Award from the National Institutes of Health.

Dr. Offit has published more than 130 papers in medical and scientific journals in the areas of rotavirus-specific immune responses and vaccine safety. He is also the co-inventor of the rotavirus vaccine, RotaTeq, recommended for universal use in infants by the CDC; for this achievement, Dr. Offit received the Gold Medal from the Children’s Hospital of Philadelphia, the Jonas Salk Medal from the Association for Infection Control and Epidemiology, the Luigi Mastroianni Clinical Innovator and the William Osler Patient Oriented Research Awards from the University of Pennsylvania School of Medicine, and the Charles Mérieux Award for Achievement in Vaccinology and Immunology from the National Foundation for Infectious Diseases. In 2009, Dr. Offit received the President’s Certificate for Outstanding Service from the American Academy of Pediatrics.

Dr. Offit was a member of the Advisory Committee on Immunization Practices to the Centers for Disease Control and Prevention, is a founding advisory board member of the Autism Science Foundation, and is the author of five books: Vaccines: What You Should Know (Wiley, 2003, 3rd Edition), Breaking the Antibiotic Habit (Wiley, 1999), The Cutter Incident: How America’s First Polio Vaccine Led to Today’s Growing Vaccine Crisis (Yale University Press, 2005), Vaccinated: One Man’s Quest to Defeat the World’s Deadliest Diseases (HarperCollins, 2007), and Autism’s False Prophets: Bad Science, Risky Medicine, and the Search for a Cure (Columbia University Press, 2008).





Mark Sawyer, MD
Professor, Clinical Pediatrics & Pediatric Infectious Disease Specialist
UCSD School of Medicine & Rady Children’s Hospital San Diego

Dr. Mark Sawyer is a Professor of Clinical Pediatrics and a Pediatric Infectious Disease specialist at the UCSD School of Medicine and Rady Children’s Hospital San Diego. He is the medical director of the UCSD San Diego Immunization Partnership, a contract with the San Diego County Agency for Health and Human Services to improve immunization delivery in San Diego.

He is the current chair of the California Immunization Committee, an advisory committee to the California State Immunization Branch, and a current member of the CDC Advisory Committee on Immunization Practices (ACIP).

Dr. Sawyer is a fellow of the American Academy of Pediatrics and belongs to numerous professional societies including the Society of Pediatric Research, the Infectious Disease Society of America and the Pediatric Infectious Diseases Society.





Mary Beth Koslap-Petraco DNP, PNP-BC, CPNP
Coordinator, Child Health Suffolk County Department of Health Services, NY (retired)

Dr. Mary Koslap-Petraco is a Nurse Consultant on the staff of the Immunization Action Coalition, CEO and a primary care provider in her own private practice and serves on the executive board of Every Child by Two. She is a nationally known expert in immunization practice and has been an advisor for the Centers for Disease Control and Prevention and previously served on the Advisory Board of the Immunization Action Coalition and National Vaccine Advisory Committee. Dr. Koslap-Petraco is an adjunct clinical assistant professor at Stony Brook University School of Nursing in Stony Brook, NY where she teaches in the Pediatric Nurse Practitioner Program. She has over 25 years of experience in public health and has advised local and state health departments on immunization public policies using her expertise as a public health nurse to influence system level changes. Dr. Koslap-Petraco is also the PKIDS on line Advice Nurse, and received ANA’s Bringing Immunity to Every Community Award. She is a Fellow of the American Association of Nurse Practitioners.





Alison Singer
Co-Founder & President Autism Science Foundation

Alison Singer is Co-Founder and President of the Autism Science Foundation (ASF), a not-for-profit organization launched in April 2009 to support autism research. From 2005-2009, she served as Executive Vice President and a member of the Board of Directors at Autism Speaks.

The Autism Science Foundation supports autism research by providing funding and other assistance to scientists and organizations conducting, facilitating, publicizing and disseminating autism research. Founded by parents of children with autism, ASF also provides information about autism to the general public and serves to increase awareness of autism spectrum disorders and the needs of individuals and families affected by autism. The organization adheres to rigorous scientific standards and values.

As the mother of a child with autism and legal guardian of her adult brother with autism, she is a natural advocate. In 2007, Ms. Singer was appointed by Health and Human Services Secretary Michael Leavitt to serve as one of six public members of the Federal Interagency Autism Coordinating Committee (IACC) which is charged with writing a strategic plan to guide federal spending for autism research. Within the IACC, she serves on the services subcommittee and on the subcommittee for strategic plan review.

Ms. Singer also currently serves on the Executive Board of the Yale Child Study Center Associates Committee, on the external advisory board of the Autism Baby Siblings Research Consortium, on the external advisory board of the CDC’s Center for Birth Defects and Developmental Disabilities, on the board of directors of Mental Health News, as a member of the American Academy of Pediatrics’ New York State Immunization Coalition, and as a member of the program committee for the International Meeting for Autism Research (IMFAR).