Dana-Farber Cancer Institute and the Jimmy Fund regularly represent one of the largest contingencies of runners and fund-raisers at the Boston Marathon. This year was no different. On Tuesday afternoon, the hospital sent this note to team members and supporters:

Our hearts and prayers go out to everyone affected by the tragedy at the Boston Marathon finish line yesterday. The events have led to an overwhelming outpouring of concern for our runners and for each other. There were more than 550 runners from the Dana-Farber Marathon Challenge team on the course yesterday with many friends, family, volunteers, and staff cheering them on from the sidelines.

Our Dana-Farber and Jimmy Fund staff have worked through the night and continue to check in with all DFMC team members to learn of each personal situation. At this time we are fortunate to report we are not aware of any significant harm to any Dana-Farber Marathon Challenge runner, volunteer, or staffer. Sadly, though, we have confirmed a report of serious injury to two family members of a runner.

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We are grateful for the extraordinary number of people who have called Dana-Farber to schedule a blood or platelet donation. As a level 1 trauma center, our partner Brigham and Women’s Hospital’s need for blood products is consistently challenging to meet. Please consider scheduling a donation in the coming week to replenish and maintain our supply of blood products for our patients at both Brigham and Women’s Hospital and Dana-Farber Cancer Institute. You can email blooddonor@partners.org.

Thank you again to all who ran or supported runners in yesterday’s marathon. Our thoughts are with all who were affected by these terrible and unprecedented events.