Outbreak briefing

As of May 28, 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 four countries. The second lead outbreak is a Hantavirus cluster linked to cruise ship travel, affecting nine countries with eight confirmed cases, two probable cases, and three deaths.

The ongoing Ebola outbreak in the Democratic Republic of the Congo and the Hantavirus cluster linked to cruise ship travel are receiving heightened surveillance attention. Authorities and journalists should continue to monitor the situation in the Democratic Republic of the Congo and the countries affected by the Hantavirus cluster, including those with reported cases and those with potential connections to cruise ship travel.