Robin Roberts has updated her fans on her well-being via Facebook after viewers queried where the Good Morning America host was.

Roberts, who only just returned to the host's couch on GMA in February after undergoing a 5-month treatment for a rare blood disorder, told fans on the social media network that she has not been feeling well and has been hospitalized.

Roberts updated her Facebook with the note:

It saddens me that I haven't been able to join my colleagues in covering this important story.

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". 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.

But not to be too worried, as Roberts said that she is feeling much better.

"I'm feeling MUCH better, and will relax at home for the rest of the week. I'll be back on GMA next week...as my sweet momma would say: "Good Lord willing and the creek don't rise!"

When Roberts returned to GMA on February, she told the audience, "I have been waiting 174 days to say this 'Good Morning America!'"

Roberts sat alongside co-anchors George Stephanopoulos, Josh Elliott, Lara Spencer and Sam Champion. "I keep pinching myself and I realize that this is real. This is really happening," she said on the show. "Faith, family and friends have brought me to this moment and I am so full of gratitude."

The host has had many health battles in the past. Her rare blood disorder came just five years after she beat breast cancer.