Robin Roberts attends the revealing of the 'Oscar's Red Carpet Live' hosts on 'Good Morning America' at ABC Studios on February 13, 2012 in New York City. (Photo by Janette Pellegrini/Getty Images)

When Good Morning America‘s Robin Roberts announced that she was diagnosed with and undergoing treatment for the rare blood disease myelodysplastic syndrome (MDS) many people flocked to donate their bone marrow. The New York Post reports that Sally-Ann Roberts, Robin Roberts’ sister has announced that she is a match and will be the sole donor for her sister. Roberts is currently undergoing chemotherapy.

Last April, when doctors first suspected that “Good Morning America” host Robin Roberts may have contracted a rare blood disease from the chemotherapy treatments she took for breast cancer, she showed up at her mother’s house with a bag full of cheek swabs.

The swabs were to test her family to see if one of them could — if worse came to worst — be a bone-marrow donor.

Robin’s oldest sister, Sally-Ann, who anchors a morning show on the CBS station in New Orleans, says she and a friend made a prayer circle around the test kit.

“We prayed: ‘Please let this be a match,’ ” Sally-Ann told The Post yesterday.

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