A Public Health Emergency of International Concern (PHEIC) is the highest level of alert that the WHO can issue. Under the International Health Regulations (2005), it is defined as an extraordinary event that poses a public health risk to other states through the international spread of disease and potentially requires a coordinated international response.

The Bundibugyo ebolavirus (BDBV) is one of the six species of the Ebola virus. It was first identified during an outbreak in Bundibugyo District, Uganda in 2007. It is less common than the Zaire strain, with only three documented outbreaks in history (2007 in Uganda, 2012 in DRC, and 2026 in DRC/Uganda). Because it is rare, standard diagnostic tests, vaccines, and treatments developed for the Zaire strain are often ineffective against it.

The Zaire ebolavirus is the most common and lethal species of Ebola, responsible for the devastating 2014–2016 West Africa outbreak. Consequently, global medical research focused primarily on it, leading to the development of highly effective vaccines like Ervebo (rVSV-ZEBOV) and monoclonal antibody treatments like Inmazeb. However, these countermeasures are genetically targeted specifically to the Zaire strain and do not provide protection against the Bundibugyo strain.

Eastern DRC, particularly Ituri and North Kivu provinces, has faced decades of armed conflict involving numerous rebel groups. This instability has caused massive internal displacement, destroyed healthcare infrastructure, and created deep community distrust. Consequently, health workers face severe security risks, making epidemiologic surveillance, contact tracing, and patient care extremely difficult.

Kampala is the capital and largest city of Uganda, with a population of over 1.5 million people. Finding Ebola cases in a densely populated urban center with no apparent transmission link is a major warning sign. It suggests undetected community transmission is already occurring, and the risk of rapid urban spread is high, presenting a far greater control challenge than in isolated rural areas.

The 2014–2016 Ebola outbreak in West Africa was the largest and most complex Ebola epidemic in history. It began in Guinea and quickly spread across land borders to Liberia and Sierra Leone, devasting their healthcare systems and economies. Before it was declared over, it caused more than 28,600 cases and over 11,300 deaths, prompting major global health reforms and accelerating the development of the first Ebola vaccines.

Controlling Ebola outbreaks requires a multi-pronged approach because the virus is highly contagious and lethal. Key strategies include: 1) Active Case Finding & Contact Tracing to isolate cases and track exposed individuals; 2) Safe and Dignified Burials, as deceased patients have highly infectious viral loads, and traditional burial customs involving body-washing are major drivers of spread; 3) Social Mobilization to counter rumors, build community trust, and educate the public on hygiene and transmission.