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Robin Roberts is recovering at home after another stint in the hospital.

The "Good Morning America" anchor, who recently underwent a bone marrow transplant to treat a rare blood disorder, began feeling sick again during a trip to Key West, Fla. last week, and told her Facebook friends on Thursday that she was readmitted to the hospital as a result.

The problem was "nothing serious," she assured fans in her message, noting that she planned to get back to work at "GMA" next week after some time at home.

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Her announcement came shortly after the Boston Marathon bombing, which she explained she was unable to cover because of her health.

"My heart continues to go out to the remarkably strong people of Boston. We stand by you now and always," she wrote in the Facebook post. "It saddens me that I haven't been able to join my colleagues in covering this important story."

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"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. Seems my young immune system needed a little boost to fight off 'opportunistic infections.'"

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"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!'"