(Newser) – A Yale doctoral student who came back to Connecticut recently after visiting Liberia has a fever and is being tested for Ebola, officials say. The student is in isolation at Yale-New Haven Hospital, CNN reports. Meanwhile, one person in Ohio who was recently in contact with or in the vicinity of Amber Vinson, the second Texas nurse to contract the virus, is now in quarantine. Six others who were also in contact or in her vicinity have quarantined themselves and are monitoring themselves for any signs of illness, officials say. (It was earlier reported that Vinson's stepfather quarantined himself as a precaution.) The news comes as CDC chief Tom Frieden and others testified about the US Ebola response on Capitol Hill. More developments:

Nina Pham, the first Texas nurse to contract the virus, is being moved from Texas Health Presbyterian Hospital to the National Institutes of Health Clinical Center in Maryland today. She'll be in a "high-level containment facility" that is "specifically designed to provide high-level isolation capabilities and is staffed by infectious diseases and critical care specialists," says the NIH in a statement. (Vinson was transferred to Emory Hospital in Atlanta yesterday.)

An official with Texas Health Resources apologized during today's congressional hearing over the fact that Thomas Eric Duncan was initially turned away when he sought care. "We made mistakes," he said. "We did not correctly diagnose his symptoms as those of Ebola, and we are deeply sorry."

In his appearance before a House subcommittee today, Frieden was asked if the CDC would consider travel restrictions for countries involved in the Ebola outbreak, and he initially said, "We will consider any options to better protect Americans." But he later said travel restrictions aren't a good idea because they could result in people finding other ways into the US, which would keep health officials from checking their health, quarantining them if necessary, and tracking them after they enter.

However, the CDC did say yesterday it may start using a "do not board" list for people being monitored for Ebola. (Read more Ebola stories.)