The first signs of the outbreak began to appear in the southeastern African nation of Liberia, and have now spread to Sierra Leone, Nigeria, Senegal, and the United States.

The disease has killed at least 10,000 people, according to a U.N. estimate, and infected around 1.3 million people.

“We are not going to stop until the entire region of the world is free from Ebola,” President Donald Trump said in a televised address Tuesday, calling it a “world crisis.”

Trump called the disease a “cancer” and an “epidemic” that needs to be controlled.

A day earlier, the White House announced it would halt the shipment of some goods from the United Arab Emirates, including the food that was being shipped to the U.S. from Liberia.

Trump has also said he would seek to send additional military aid to the African nations, including to Sierra Lanka, where thousands have died in the virus outbreak.

His administration has been heavily criticized for its handling of the Ebola crisis, which is expected to cost the U