From DC Department of Health:
“District residents can access personal and/or family immunization records on file with the District of Columbia Immunization Information System (DOCIIS) through the Docket app.
Use of Docket® is 100% optional. It is available for free
as an app for both Apple and Android devices. You may also access it on a computer web browser. Docket® is intended only to provide consumers with access to their personal and family immunization records and offer reminders for recommended immunizations. Docket® does not sell or disclose your personal data to any third-party apps, services, or websites.
Key features include:
Access to immunization records for both you and your children.
Generate DC Health Patient Vaccine Record in PDF format.
Receive immunization reminders through push notifications.
You can sign up for Docket at vaccines.dc.gov.”