About The Study: The findings of this study of 5.1 million individuals suggested that supplementing COVID-19 claims records with Immunization Information Systems vaccination records substantially increased the number of individuals who were identified as vaccinated, yet potential under-recording remained. Improvements in reporting vaccination data to Immunization Information Systems infrastructures could allow frequent updates of vaccination status for all individuals and all vaccines.
Authors: Karen Schneider, Ph.D., of OptumServe Consulting in Falls Church, Virginia, is the corresponding author.
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