President Barack Obama has appointed an "Ebola czar" to lead the United States' response to fighting the outbreak of the deadly disease.

Rob Klain, former chief of staff to Vice President Joe Biden, was appointed by Obama earlier Friday. Meanwhile, the World Health Organization has acknowledged that it botched attempts to stop the Ebola outbreak in West Africa, blaming incompetent staff and a lack of information.

In the U.S., two American nurses who treated Thomas Eric Duncan at a hospital in Texas before he died have been transferred to different hospitals. Amber Vinson, the second person to contract Ebola in the United States, was transferred to Emory Hospital in Atlanta for treatment. Vinson took two commercial flights between Dallas and Cleveland days before she was diagnosed. The Centers for Disease Control and Prevention says it is still reaching out to people on both flights.

Nina Pham, the first person to contract Ebola in the United States, has been taken to the National Institute of Health in Maryland for further treatment. In a video posted to YouTube, she appears to be in good spirits. Doctors say she is in fair condition and resting comfortably.