March 13, 2015 1:21 PM EDT
T he American health care worker who was infected with Ebola while volunteering in Sierra Leone has arrived at the National Institutes of Health (NIH) in Bethesda, Md. for treatment.
“NIH physicians have evaluated the patient with Ebola virus disease and have determined that the patient’s condition is serious. No additional details about the patient are being shared at this time,” the NIH said in a statement.
MORE: American Health Worker With Ebola Heading to U.S. for Treatment
The patient, who has not been named, arrived at the Maryland facility’s special unit for serious infectious diseases at 4:44 a.m. Friday morning. The patient is the second to be treated for Ebola at the NIH. The first was Dallas nurse Nina Pham, who was infected after treating Thomas Eric Duncan, the first patient with Ebola to be diagnosed in the U.S.
The World Health Organization reports that there have been over 10,000 deaths in Sierra Leone, Liberia and Guinea so far, and 24,509 total cases as of Friday.
PHOTOS: See How a Photographer is Covering Ebola’s Deadly Spread Members of a Liberian Red Cross burial team, under contract from the Liberian Ministry of Health, remove the body of suspected Ebola victim Lorpu David, 30, on Sept. 18, 2014, in the Gurley street community in central Monrovia, Liberia. Daniel Berehulak—The New York Times/Redux Members of a Liberian Red Cross burial team, remove the body of woman, 75, a suspected Ebola victim on Sept. 18, 2014 in Monrovia, Liberia. Daniel Berehulak—The New York Times/Redux A burial team collects the body of a 75-year-old woman in a neighborhood called PHP in Monrovia, Liberia, Sept. 18, 2014. Daniel Berehulak—The New York Times/Redux A resident of the West Point neighborhood covers his nose as a burial team leaves with a body in Monrovia, Liberia, Sept. 17, 2014. Daniel Berehulak—The New York Times/Redux Members of a burial team from the Liberian Red Cross remove the body of a man, a suspected Ebola victim, from a home in Matadi on Sept. 17, 2014 in Monrovia, Liberia.
Daniel Berehulak—The New York Times/Redux A member of a Liberian Red Cross burial team is disinfected, with chlorine sprayed on by a colleague, after having removed the body of a man, a suspected Ebola victim, on Sept. 6, 2014 in Monrovia, Liberia.
Daniel Berehulak—The New York Times/Reportage by Getty Images Residents look on as the body of a man suspected of dying from Ebola lies in a busy street after it was reportedly dragged there to draw the attention of burial teams. For several days, his family had asked for the body to be picked up, to no avail. Monrovia, Liberia, Sept. 15, 2014. Daniel Berehulak—The New York Times/Redux Friends and relatives weep as a burial team removes the body of a 75-year-old woman. Her neighbors insisted she had died of a stroke. Monrovia, Liberia, Sept. 18, 2014. Daniel Berehulak—The New York Times/Redux Eric Gweah, 25, grieves as he watches members of a Red Cross burial team carry the body his father, Ofori Gweah, 62, a suspected Ebola victim, in a riverside area called Rock Spring Valley in central Monrovia, Liberia, Sept. 18, 2014. Ofori Gweah had endured Ebolaís telltale symptoms for six days, his family took him to treatment centers twice, only to be turned back. So many Ebola victims are dying at home due to a severe shortage of treatment centers in Monrovia, and many of the ill are infecting family members, neighbors and others in a ballooning circle of contagion. (Daniel Berehulak/The New York Times) Daniel Berehulak—The New York Times/Redux Residents discuss an Ebola awareness campaign in Monrovia, Liberia, Aug. 30, 2014. Daniel Berehulak—The New York Times/Redux Residents of the West Point neighborhood attend church after a 10-day quarantine was lifted in Monrovia, Liberia, Aug. 31, 2014. Daniel Berehulak—The New York Times/Redux James Dorbor, 8, suspected to have Ebola, lays on the ground as his father Edward tried to get the boy to drink coconut water. They waited for James to be admitted into the JFK Ebola treatment center on Sept. 5, 2014 in Monrovia, Liberia. Daniel Berehulak—The New York Times/Reportage by Getty Images Edward Dorbor reacts after believing that his son, James Dorbor, 8, had died. However, the boy survived for a few additional hours before dying at the JFK Ebola treatment center on Sept. 5, 2014 in Monrovia, Liberia. Daniel Berehulak—The New York Times/Reportage by Getty Images Medical staff rush into the treatment facility, carrying James Dorbor, 8, suspected of having Ebola. Since the health workers weren't wearing the appropriate protection against Ebola, they positioned James' body in a way to limit exposure to the deadly virus. Monrovia, Liberia, Sept. 5, 2014. Daniel Berehulak—The New York Times/Redux A relative grieves as members of a Liberian Red Cross burial team dress themselves in full protective clothing prior to removing the body of suspected Ebola victim, Ofori Gweah, 62, on Sept. 18, 2014 in central Monrovia, Liberia. Daniel Berehulak—The New York Times/Redux Medical staff spray down a small plastic bag containing the blood sample of Hawa Konneh, 9, a suspected Ebola victim, as she lays on the dirt wrapped in a shawl in front of the Doctors Without Borders (MSF) Ebola treatment center, as her mother, Masogbe, sits near to her prior to Hawa's passing away on Sept. 4, 2014 in Monrovia, Liberia. Daniel Berehulak—The New York Times/Reportage by Getty Images Marvin Gweah, 28, is overcome by emotion as members of a Liberian Red Cross burial team carry away the body of his father, Ofori Gweah, 62, a suspected Ebola victim, on Sept. 18, 2014 in central Monrovia, Liberia. Daniel Berehulak—The New York Times/Reportage by Getty Images More Must-Reads from TIME How Donald Trump Won The Best Inventions of 2024 Why Sleep Is the Key to Living Longer Robert Zemeckis Just Wants to Move You How to Break 8 Toxic Communication Habits Nicola Coughlan Bet on Herself—And Won Why Vinegar Is So Good for You Meet TIME's Newest Class of Next Generation Leaders