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    Safety Information by Vaccine

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    Get the latest safety information from CDC on recommended U.S. vaccines – safety studies, common side effects, vaccine information statements and more.

    • Chickenpox (Varicella) Vaccines
    • Diphtheria, Tetanus, and Pertussis Vaccines
    • Haemophilus influenzae Type b (Hib) Vaccines
    • Hepatitis A Vaccines
    • Hepatitis B Vaccines
    • Human Papillomavirus (HPV) Vaccine
    • Influenza (Flu) Vaccines
    • Measles, Mumps, Rubella (MMR) Vaccines
    • Measles, Mumps, Rubella, Varicella (MMRV) Vaccines
    • Meningococcal Vaccines
    • Mpox Vaccine
    • Pneumococcal Vaccines
    • Rotavirus Vaccine
    • Shingles (Herpes Zoster) Vaccines
    • Smallpox Vaccine
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    Common Vaccine Safety Questions and Concerns

    These pages will help answer common questions about vaccine safety.

    Related Links
    • Information for Parents and Caregivers
    • Vaccine Safety Information for Healthcare Providers
    • Common Vaccine Safety Questions and Concerns
    Last Reviewed: October 20, 2022
    Source: Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Healthcare Quality Promotion (DHQP)
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    homeVaccine Safety
    • Safety Information by Vaccineplus icon
      • Chickenpox (Varicella) Vaccines
      • Diphtheria, Tetanus, and Pertussis Vaccines
      • Haemophilus influenzae type b (Hib) Vaccines
      • Hepatitis A Vaccines
      • Hepatitis B Vaccines
      • Human Papillomavirus (HPV) Vaccineplus icon
        • Questions about HPV Vaccine Safety
      • Influenza (Flu) Vaccines
      • Measles, Mumps, Rubella (MMR) Vaccinesplus icon
        • MMR Safety Studies
      • Measles, Mumps, Rubella, Varicella (MMRV) Vaccinesplus icon
        • VSD MMRV Safety Study
        • MMRV Safety Studies
        • MMRV and Febrile Seizures
      • Meningococcal Vaccines
      • Mpox Vaccines
      • Pneumococcal Vaccines
      • Rotavirus Vaccine
      • Shingles (Herpes Zoster) Vaccines
      • Smallpox Vaccine
    • Questions and Concernsplus icon
      • Adjuvants
      • Autismplus icon
        • CDC Statement: 2004 Pediatrics Paper on MMR and Autism
      • Fainting after Vaccination
      • Febrile Seizures
      • Guillain-Barre Syndrome
      • Multiple Vaccinations at Once
      • Sudden Infant Death Syndrome (SIDS)
      • Thimerosalplus icon
        • CDC Study (2010 ) on Thimerosal and Risk of Autism
        • Thimerosal FAQs
        • Related Scientific Articles
        • Infant and Environmental Exposures to Thimerosal 2007 Study
        • Timeline: Thimerosal in Vaccines
      • Vaccines During Pregnancy FAQs
      • FAQs about Vaccine Recalls
      • Historical Vaccine Safety Concernsplus icon
        • GBS and Menactra Vaccine FAQs
        • Gardasil Vaccine Recall (2013) FAQs
        • Hep B and Multiple Sclerosis FAQs
        • Hib Vaccine Recall (2007) Summary
        • Narcolepsy Following Pandemrix Influenza Vaccination in Europe
    • Information for Healthcare Providersplus icon
      • Talking to Patients About Vaccine Safety
      • Reporting Adverse Events
      • Resources for Healthcare Providers
    • Information for Parents and Caregiversplus icon
      • Vaccine Safety FAQs
    • Researchplus icon
      • Publications
      • Partner Reports on Vaccine Safety
      • ISO Scientific Agenda
    • Ensuring Safetyplus icon
      • Overview, History, and How It Works
      • Side Effects and Adverse Events
      • Vaccine Safety Monitoringplus icon
        • Vaccine Adverse Event Reporting System (VAERS)
        • CISAplus icon
          • CISA Resources for Healthcare Professionals
          • Evaluation
          • Clinical Research Studies
          • Historical Background 2001-12
          • Publications
          • Technical Reports
        • Vaccine Safety Datalink (VSD)plus icon
          • Accessing Data from Vaccine Safety Datalink
          • Data Sharing Guidelines
          • Vaccine Safety Datalink Publications
        • V-safe After Vaccination Health Checkerplus icon
          • V-safe Print Materials
          • Frequently Asked Questions and Troubleshooting
        • Emergency Preparedness
      • Vaccine Safety Partners
    • About ISO
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