Outbreak briefing

As of 26 May 2026, two active outbreaks are being monitored globally. The lead outbreak is the Ebola disease caused by Bundibugyo virus in the Democratic Republic of the Congo, with 85 confirmed cases, 746 probable cases, and 176 deaths reported across 4 countries. The second lead outbreak is a Hantavirus cluster linked to cruise ship travel, affecting 9 countries with 12 confirmed cases, 2 probable cases, and 3 deaths. These outbreaks are being closely monitored due to their severity and potential for further spread.

The ongoing Ebola and Hantavirus outbreaks are receiving high surveillance attention, with authorities and journalists closely watching the situation in the Democratic Republic of the Congo and the countries affected by the Hantavirus cluster. The rapid spread of these diseases highlights the need for continued vigilance and coordination among public health officials to prevent further transmission and mitigate the impact of these outbreaks.