Bundibugyo Ebola: What U.S. Healthcare Workers Should Know Despite Low Risk

In recent years, infection preventionists (IPs) and environmental services (EVS) leaders have continually navigated emerging pathogen threats, from avian influenza and mpox to the recent Hantavirus outbreak, highlighting that high-consequence pathogens are ongoing operational realities, not theoretical risks.

^{Image Source: https://www.cdc.gov/ebola/about/index.html}

The current Ebola Bundibugyo situation in central and eastern Africa is a further reminder that preparedness must be continuous, embedded, and adaptive rather than episodic or reactive.

While the risk remains high in affected regions such as the Democratic Republic of the Congo (DRC), the World Health Organization (WHO) currently assesses the global risk as low.¹

The U.S. has implemented targeted travel restrictions, but no screening system is foolproof, and the possibility of an imported case cannot be eliminated. With a large, international soccer tournament just weeks away, increased international travel further elevates the relevance of this threat. Healthcare facilities should maintain vigilance by screening patients presenting with fever and relevant travel history and be prepared to implement Ebola precautions when indicated.² This blog provides a brief overview of the current outbreak, key aspects of Ebola epidemiology and transmission, and practical considerations for infection prevention and control (IPC), including environmental cleaning and disinfection.

On May 16, 2026, a large outbreak of Ebola Bundibugyo virus was detected and reported in the DRC with findings suggesting a potentially much larger outbreak than what was being detected and reports. On May 17, 2026, the WHO determined the situation to be a public health emergency of international concern (PHEIC), and on May 19, 2026, the Centers for Disease Control and Prevention (CDC) issued a Health Alert Network (HAN) Health Advisory about the outbreak.^3,4 When it was reported, there were already several hundred suspected cases including 80 deaths. At the same time, two cases in Uganda among travelers from the DRC were reported. Because the test used early in the outbreak did not target the outbreak strain, false negative results allowed the virus to get a several-week head start on response efforts. While this is a rapidly evolving situation, as of June 2, 2026, a total of 321 confirmed cases, 116 suspected cases including 48 confirmed deaths have been reported in the DRC and Uganda.⁵

Over the past 50 years, there have been 17 prior Ebola outbreaks in the DRC, but what makes this one different is the type of Ebola virus — Bundibugyo — which is different from the predominant strain (Zaire virus). We have less experience with this strain as there have only been two prior outbreaks documented (2007 and 2012).6 There is no vaccine or treatment approved for Bundibugyo so far. Although experts have identified some potential therapeutic drugs and a vaccine (remdesivir) showing some efficacy against Bundibugyo. They have also identified a possible vaccine (obeldesivir) for post-exposure prophylaxis for contacts of cases. Clinical trials will be integrated with response efforts.

Below is what you need to know about Bundibugyo Ebola and its implications for environmental hygiene and infection prevention. For a concise overview, see our Ebola Pathogen Education Sheet.

About Ebola viruses, including the Bundibugyo Ebola virus

Ebola virus disease (EVD) is caused by Filoviridae viruses, specifically members of the Orthoebolavirus genus. EVD, a rare but severe and often fatal viral hemorrhagic fever, was first identified in 1976. The viruses primarily circulate in fruit bats in sub-Saharan Africa. EVD is a high-consequence, low-frequency disease necessitating strict infection prevention and control measures.⁷

Transmission to humans is predominantly through direct contact with infected animal or human body fluids, although transmission from contact with contaminated surfaces is a real and recognized risk. Splashes of infected body fluids to mucous membranes and aerosol-generating procedures are particularly hazardous.⁸

According to the WHO, people cannot transmit the disease before they have symptoms.⁷ Signs and symptoms of infection appear 2–21 days (average 8–10 days) after exposure. EVD typically progresses in two broad phases: “dry,” followed by “wet” outlined in the table below. The “dry” phase is often confused with more common infectious diseases, such as malaria or typhoid fever. The “wet” phase typically develops after 4–5 days of illness.⁹

^{Source: CDC COCA Call “What Clinicians Should Know About Ebola Bundibugyo Virus”; 2026 May 28}

Infection prevention and control measures for Ebola (including Bundibugyo)

Despite the current low risk to the U.S., healthcare facilities should remain vigilant for Ebola, a high-consequence infectious disease (HCID), through the 3I framework: Identify, Isolate, and Inform.¹⁰

1. Identify: Early recognition at points of entry such as emergency departments, urgent care, and ambulatory clinics:¹¹
   • Maintain continuous situation awareness by monitoring local, national, and global outbreak updates.¹¹
   • Perform syndromic surveillance for fever and other relevant signs and symptoms.¹¹
   • Screen for travel history to affected areas in the prior 21 days. Because fever is not universally present, this underscores the importance of travel screening.¹²
   • Determine when screening will escalate from passive (e.g., signs at entrances) to active (e.g., direct questioning).¹²
2. Isolate: Interrupt transmission as soon as a suspect case is identified:12
   • Mask the patient and place immediately in a private airborne isolation infection room (AIIR)¹²
   • Restrict patient movement¹²
   • Only essential personnel should enter the room and keep a log of all who enter and/or are involved in the patients’ care.¹²
   • Wear appropriate Ebola PPE – this topic could be a blog in itself! At a minimum, PPE should include an impermeable gown or coveralls, apron, respirator, full face protection, double gloves with extended cuffs, shoe covers.¹² Learn more here.
   • Have a trained observer present for PPE donning and doffing¹²
   • Proper disposal of PPE (category A waste)¹²
3. Inform: Ensure timely escalation internally and externally.¹¹
   • Notify Infection Prevention and Facility leadership as well as local public health authorities.¹¹
   • Prepare to activate the hospital incident command system (HICS).¹¹
   • Prepare to collaborate with the regional special pathogens center (e.g., RESPTC) to facilitate patient transfer.¹¹

^{Image source: CDC Museum}

Finally, the environmental hygiene measures to prevent Ebola transmission include:

• Linen management: Soiled linens including cleaning cloths are to be handled and discarded as Category A waste. Ready-to-use disposable disinfecting wipes are ideal for cleaning rooms housing patients with an HCID such as Ebola.¹³
• Waste management: Ebola viruses are classified as a Category A infectious substance. Any item that is (1) contaminated or suspected of being contaminated with a Category A infectious substance and (2) transported offsite for disposal must be packaged and transported in accordance with the U.S. Department of Transportation's (DOT) Hazardous Materials Regulations.¹³
• Cleaning and disinfection:
  ◦ Only personnel trained in Ebola protocol should enter the room for cleaning.¹³
  ◦ The patient care area, including the doffing area, should be cleaned routinely.¹³
  ◦ Use EPA-registered healthcare disinfectants from List L (disinfectants effective against Ebola virus) or List Q with an emerging viral pathogen (EVP) claim.¹³
  ◦ Ideally, use ready-to-use disposable cleaner disinfectants.¹³
  ◦ Wearing appropriate PPE, disinfect contaminated surfaces following all manufacturer directions-for-use, including concentration, contact time, and care and handling.¹³
  ◦ The basic principles for blood and body fluid spill management as outlined by OSHA should be followed.¹³

Even though the risk to the U.S. is low, healthcare facilities should pay attention to the Bundibugyo Ebola outbreak. Rare but severe infectious threats can still reach our borders through international travel. Healthcare facilities should be ready to recognize possible cases quickly and initiate appropriate precautions and containment measures. Environmental cleaning and disinfection of contaminated surfaces is a core defense in reducing transmission risk of this high-consequence pathogen.