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.

The cancellations, largely announced days or weeks in advance rather than at the last minute, come as carriers adjust schedules to manage higher operating costs. Lufthansa Group said it would cut around 20,000 short-haul flights across its network through October, reflecting broader industry pressures.

The timing coincides with a seasonal surge in travel demand and major global events such as the FIFA World Cup, increasing pressure on airlines and airport capacity. Eric Napoli, chief legal officer at AirHelp, said the disruption adds complexity for passengers navigating varying compensation rules and rebooking options.

Airlines typically offer affected passengers a choice between a refund or rebooking on the next available flight, though the scope of rights depends on the jurisdiction. In the United States, passengers are entitled to a full refund if they choose not to travel following a cancellation, regardless of the cause.

Internationally, protections differ significantly. The Montreal Convention governs airline liability across more than 140 countries, while regional frameworks in the European Union and the United Kingdom provide stronger protections, including compensation in certain cases and a “duty of care” requiring airlines to assist passengers during disruptions.

In contrast, protections in the United States, Canada and parts of Asia are more limited or dependent on airline policies. Industry experts advise travelers to review the passenger rights rules of their departure country before flying.

Travelers affected by cancellations are encouraged to check airline apps or websites for rebooking options, retain documentation such as tickets and communications, and consider alternative routes or airports where necessary.

Experts caution against immediately accepting the first rebooking option without exploring other possibilities.Airlines have cited fuel shortages and rising costs as key drivers of schedule reductions, though such reasons do not automatically negate passenger rights in jurisdictions with stronger consumer protections.

The disruptions highlight mounting pressure on the aviation sector as it navigates elevated fuel costs and peak travel demand ahead of the summer season.

The Saudi embassy in Beirut said the advisory was issued due to the “repercussions of the current events,” noting that a travel ban to Lebanon had already been in place for several years.

The warning comes as Israeli forces deploy thousands of troops into southern Lebanon, aiming to secure territory up to the Litani River, about 30 kilometers from the border.

Since March 2, more than one million people have been displaced across Lebanon, according to the United Nations High Commissioner for Refugees. Around 136,000 are sheltering in approximately 660 collective sites, many of them overcrowded schools with limited sanitation access.

UNHCR representative Karolina Lindholm Billing said the situation on the ground was “extremely worrying,” warning of a real risk of humanitarian catastrophe if the conflict continues.

“Lebanon was already facing multiple crises, and this massive displacement is adding immense pressure,” she said, adding that affected civilians repeatedly expressed a desire to return home.

The UN refugee agency has appealed for more than $60 million to scale up its response, but officials say needs are rising faster than available funding as displacement accelerates.

The developments underscore mounting regional fallout from the conflict, with foreign governments increasingly issuing advisories to protect their citizens amid deteriorating security conditions.