Association Between Vaccine Exemption Policy Change in California and Adverse Event Reporting.
BACKGROUND: California Senate Bill 277 (SB277) eliminated non-medical immunization exemptions. Since its introduction on February 19, 2015, the rate of medical exemptions in the state has increased. Filing a report to Vaccine Adverse Event Reporting System (VAERS) may be perceived as helpful in applying for a medical exemption. Our objective was to describe trends in reporting to VAERS from California coincident with introduction of SB277.
METHODS: This was a retrospective study of Californian children <18 years for whom a VAERS report was submitted between June 1, 2011 and July 31, 2018. VAERS is a national, passive, vaccine safety surveillance program co-managed by Centers for Disease Control and Prevention and FDA. The main outcomes were the proportion of VAERS reports submitted by parents (vs. other reporter types), time from immunization to VAERS report (reporting time), and adverse event type. We also performed spatial analysis, mapping reports pre- and post-mandate by county.
RESULTS: We identified 6703 VAERS reports from California during the study period. The proportion of reports received from parents increased after implementation of SB277, from 14% to 23%. The median reporting time by parents increased from 9 days in 2013-2014 to 31 days in 2016-2017. After the introduction of SB277, we observed an increase in reports describing behavioral and developmental symptoms among reports submitted >6 months after immunization.
CONCLUSIONS: These recent changes in reporting patterns coincident with the introduction of SB277 may indicate that more parents are using VAERS to assist in applying for a medical exemption for their child.
|ジャーナル名||The Pediatric infectious disease journal|
|投稿者||Hause, Anne M; Hesse, Elisabeth M; Ng, Carmen; Marquez, Paige; McNeil, Michael M; Omer, Saad B|
|組織名||From the Immunization Safety Office, Division of Healthcare Quality Promotion,;National Center for Emerging and Zoonotic Infectious Diseases, CDC, Atlanta,;Georgia.;Hubert Department of Global Health, Rollins School of Public Health, Emory;University, Atlanta, Georgia.;Emergency Preparedness and Response Branch, Division of Preparedness and Emerging;Infections, National Center for Emerging and Zoonotic Infectious Diseases, CDC,;Atlanta, Georgia.;Yale Institute for Global Health, Yale University, New Haven, Connecticut.;Department of Medicine, Yale School of Medicine, New Haven, Connecticut.;Department of Epidemiology of Microbial Diseases, Yale School of Public Health,;New Haven, Connecticut.|