“Good Morning America” co-host Robin Roberts revealed that she had to be hospitalized last week and treated for a virus that arose as a complication from the bone marrow transplant she underwent in September.

“After about a week back in the hospital, I returned home Friday night,” Roberts wrote in her latest post on her ABC News blog. “A latent virus, many of us have, was not responding to medication and was pulling down my numbers. Our immune systems usually take care of a virus like this…but mine is only 59 days old.”

Roberts said doctors have since gotten the virus under control and said she’s been “moved to tears” by all the support she’s received from her GMA family and viewers.