Robin Roberts 'Much Better' After Health Setback

UP: Robin Roberts

The "Good Morning America" anchor lands a huge scoop with President Obama's same-sex-marriage interview, adding to GMA's recent momentum in its ratings battle with NBC's "Today."

Robin Roberts says she'll return to Good Morning America next week after suffering a health setback while on vacation in Florida.

The GMA co-host re-joined George Stephanopoulos in February after nearly six months off the air to battle to fight  myelodysplastic syndrome, a rare bone marrow and blood disorder. She received a bone marrow transplant last September.

"Last week, in the middle of my Key West vacation, I began not to feel well. Nothing serious, just under the weather. I contacted my doctors and flew back to NYC. They felt it best to admit me into the hospital for a few days," Roberts said Thursday in a post on Facebook

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"Seems my young immune system needed a little boost to fight off 'opportunistic infections.' My doctors assured me that this was NOT because I was working or doing too much, too soon. It's extremely common, post bone marrow transplant, to have complications. I'm blessed that mine have not been severe. I'm feeling MUCH better, and will relax at home for the rest of the week. I'll be back on GMA next my sweet momma would say: 'Good Lord willing, and the creek don't rise!'"

Roberts, 52, who made THR's 2013 list of The 35 Most Powerful People in Media, also addressed her absence in the wake of the Boston Marathon bombings, writing: "My heart continues to go out to the remarkably strong people of Boston. We stand by you now and always. It saddens me that I haven't been able to join my colleagues in covering this important story."