The US State Department elevated the three countries to its highest advisory level, “Level 4: Do Not Travel,” while also advising citizens to reconsider travel to neighboring Rwanda due to its proximity to affected regions.

The advisory followed new emergency measures announced by the Centers for Disease Control and Prevention, including enhanced airport screening procedures for travelers arriving from outbreak-hit areas and temporary visa-related restrictions.

US health authorities said non-American passport holders who had traveled to Uganda, the Democratic Republic of Congo or South Sudan within the previous 21 days would face restrictions on entry into the United States.

The CDC said the risk of Ebola spreading within the United States remained low but confirmed it was coordinating the evacuation of an American doctor infected with the virus in the DRC, along with six additional individuals undergoing medical monitoring.
German authorities said on Tuesday they were prepared to receive the infected US doctor for treatment.

The latest outbreak involves a strain of Ebola for which no approved vaccine or treatment has yet proven effective, according to health officials.

The CDC said it was expanding technical support for authorities in the Democratic Republic of Congo and working with international partners to strengthen surveillance and containment operations.

The US State Department said Washington was mobilizing approximately $13 million in emergency assistance to support the response.

Questions have also emerged regarding whether recent funding cuts to the United States Agency for International Development affected outbreak preparedness and monitoring capabilities in the region. US officials declined to directly address concerns about whether reductions in USAID resources had weakened health response infrastructure.

US President Donald Trump said he was concerned about the outbreak but described the situation as currently confined to Africa.

Ebola, a highly infectious hemorrhagic fever first identified in 1976, has killed an estimated 15,000 people globally over the past five decades. Depending on the strain, fatality rates can reach as high as 90 percent.

Public health experts have long warned that fragile healthcare systems, regional instability and population displacement in parts of Central Africa complicate efforts to rapidly contain outbreaks.