Health Ministry data showed dengue-related deaths increased from one at the end of May to 18 by the end of June, while reported infections surged more than eightfold over the same period, rising from 714 cases to 5,924.

Professor Kabirul Bashar, an entomologist at Jahangirnagar University, said dengue cases in Dhaka were expected to at least double in July compared with June and could increase three- to fourfold by August.

Bashar warned that districts outside the capital could experience an even steeper rise in infections, with several regions facing heightened risk as the outbreak expands.

Bangladesh experienced its deadliest dengue outbreak in 2023, when more than 321,000 people were infected and 1,705 died. Official data show the country recorded 101,214 infections and 575 deaths in 2024, followed by 102,861 cases and 413 fatalities last year.

The dengue threat comes as Bangladesh is also confronting one of its most severe measles outbreaks in decades. Since mid-March, authorities have reported more than 100,000 suspected cases, over 10,000 confirmed infections and more than 700 deaths, placing additional strain on the country’s healthcare system.

Heavy rainfall, high humidity and warm temperatures have accelerated mosquito breeding, while vector-control measures have failed to keep pace with the growing public health challenge, Bashar said.

He urged the government to establish a nationwide early warning system to identify mosquito breeding sites and emerging transmission hotspots, allowing authorities to respond more rapidly and alert communities before outbreaks intensify.

“The window to contain the outbreak is narrowing,” Bashar said.

Congo said on Thursday that Ebola had reached three new health zones, bringing the outbreak total to 676 confirmed cases and 136 deaths. The outbreak has also crossed into neighboring Uganda.

“There are still many blind spots in some areas that are high risk,” Olivier le Polain, a WHO epidemiologist based in Beni, eastern Congo, said.

Le Polain said surveillance systems needed to be strengthened in affected regions, adding that a shortage of isolation beds remained a major challenge. Only 250 beds were available across the three affected provinces, he said.

The outbreak involves the rare Bundibugyo strain of Ebola, for which there is currently no approved treatment or vaccine. Health workers said the disease went undetected for weeks, leaving responders struggling to contain its spread.

The WHO has not yet issued projections on the possible scale of the outbreak, Le Polain said.

The warning came after the US Centers for Disease Control and Prevention said the outbreak could potentially reach levels comparable to the 2014-2016 Ebola epidemic in West Africa, which killed more than 11,000 people.

Health officials said efforts to control the current outbreak are being complicated by limited medical resources and challenges in identifying cases early.

The newly identified cases include a Ugandan driver who transported the country’s first confirmed Ebola patient and a healthcare worker who was exposed to the virus while caring for the same individual, the ministry said in a statement.

A Congolese woman was also confirmed to have contracted the disease, bringing the cumulative number of confirmed infections to five.

Health authorities did not immediately provide additional details on the conditions of the patients or whether further contacts were being monitored. The latest infections underscore the risks faced by frontline medical personnel and individuals who come into close contact with infected patients during outbreak investigations.

Uganda has previously experienced several Ebola outbreaks and has developed response mechanisms that include contact tracing, patient isolation and public health surveillance aimed at limiting transmission.

The confirmation of additional cases is likely to heighten monitoring efforts by health officials as they seek to prevent wider community spread and identify potential chains of transmission linked to the initial patient.

Ebola is a severe viral hemorrhagic disease transmitted through direct contact with the bodily fluids of infected individuals or contaminated materials. Outbreaks require rapid detection and containment measures to prevent further spread.

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.