Vaccine Social Media Randomized Intervention Trial (VSMRCT)

This study will assess the effectiveness of social media website devoted to vaccines to change immunization knowledge, perceptions and behavior. If effective, this intervention will represent an innovative, low cost and broadly applicable resource to reduce parental vaccination concerns. The study has two hypothesis: Parents receiving usual care plus social media website will demonstrate higher early childhood immunization rates to parents receiving either usual plus non interactive website or usual care only. Parents receiving usual care plus social media website will demonstrate positive changes in knowledge, attitudes and beliefs supporting vaccination compared to parents receiving either usual care plus non-interactive website or usual care only.

Participants will be enrolled in the study, stratified based on hesitancy and randomly assigned to 1 of 3 study arms and followed for 1-2 years.

Participants will have access to the vaccine social media website with information pages and social media features including discussion forums, blogs, chat with an expert, and ask an expert.

Participants will receive access to the study vaccine website information pages and social media feature including blogs, discussion forums, expert chats, and ask an expert.

Days under-immunized is a metric to identify immunization delay. For each vaccine dose calculate the difference between when the vaccine dose was actually administered and when the vaccine dose should have been administered according to the Advisory Committee on Immunization Practices (ACIP) schedule. That difference is summed across all doses and vaccines for a total number of days under-immunized for each child. Total days under immunized was calculated 200 days after life or after enrollment. If someone had 0 days at that time they were considered "up to date".

Knowledge, attitudes, and beliefs will be measured with a survey at up to 3 time points during the study: 1) Initial enrollment in the study, 2) child's ag=4-6 months and 3) child's age=11-13 months.

Inclusion Criteria: Women >20 weeks Pregnant (including parents of children up to 1 year of age). >18 years of age Exclusion Criteria: Non english speak Do not intend to use Kaiser insurance for the child

O'Leary ST, Narwaney KJ, Wagner NM, Kraus CR, Omer SB, Glanz JM. Efficacy of a Web-Based Intervention to Increase Uptake of Maternal Vaccines: An RCT. Am J Prev Med. 2019 Oct;57(4):e125-e133. doi: 10.1016/j.amepre.2019.05.018. Epub 2019 Aug 27.

Daley MF, Narwaney KJ, Shoup JA, Wagner NM, Glanz JM. Addressing Parents' Vaccine Concerns: A Randomized Trial of a Social Media Intervention. Am J Prev Med. 2018 Jul;55(1):44-54. doi: 10.1016/j.amepre.2018.04.010. Epub 2018 May 14.