1644. Household Contact Immunizations: A Feasible Method to Increase ‘Cocoon’ Protection in the Pediatric Population
Session: Poster Abstract Session: Vaccine Strategy and Policy
Friday, October 6, 2017
Room: Poster Hall CD
  • IDWeek 2017 Poster Final_For_Print.pdf (1.1 MB)
  • Background: The quadrivalent influenza vaccine is the most effective method of preventing morbidity from influenza infection. The Centers for Disease Control and Prevention (CDC) recommends that all pediatric patients 6 months or older receive yearly influenza vaccination. Influenza vaccination of household contacts (HHC) , also known as “cocooning,” is recommended to decrease the risk of influenza morbidity among high risk pediatric patients. Published studies have demonstrated the beneficial effect of influenza vaccine in both adults and children to protect close contacts. Developing a system to provide influenza vaccine to families of children in a pediatric health system has been challenging.

    Methods: Since 2006 Children’s HealthSM, Dallas, TX has offered free influenza vaccinations to all HHC of individuals encountered within the network. HHC of any individual with an inpatient, outpatient, or emergency department encounter, are eligible for free influenza vaccination. A Flu Clinic also operates during the influenza season each year to provide influenza vaccination to patients and HHC.

    Results: From 2007-2017, a total of 56,335 patient HHC (>5,500 per year), were immunized for influenza at no cost to the recipients. For the 2016-17 season 26% of those vaccinated were the HHC of a patient 0 to 2 years old, and 1182 contacts of 828 immunocompromised hosts (Solid organ transplant/Oncology/Premature infants) received free flu vaccine. 76% of all HHC were between 19 - 50 years old, with 2% older than 65 and 13% 18 years old or younger. The estimated annual cost of the program during this period was $120,613 compared with the cost of a five day influenza ICU admission of $216,000.

    Conclusion: A systems based program to offer free influenza vaccinations for pediatric HHC is a feasible approach to increase vaccination among HHC of high risk individuals and create a cocoon effect of protection for pediatric patients. Further studies are needed to investigate the direct effect of immunized household contacts on the morbidity of influenza among high risk pediatric groups.

    Zachary Most, MD, Children's Health/UT Southwestern Medical Center, Dallas, TX, Paul Sue, MD, University of Texas Southwestern Medical Center, Dallas, TX and Jane Siegel, MD, Medical Services, Corpus Christi State Supported Living Center for Adults with Intellectual and Developmental Disabilities, Corpus Christi, TX


    Z. Most, None

    P. Sue, None

    J. Siegel, None

    Findings in the abstracts are embargoed until 12:01 a.m. PDT, Wednesday Oct. 4th with the exception of research findings presented at the IDWeek press conferences.