Today's Issue

Main Topic: What has happened in the MV Hondius hantavirus outbreak from May 7 to May 26, 2026, the current case count, what the new cases tell us about transmission, and what happens next

Abstract: As of May 26, 2026, the ECDC reports 13 total cases (11 confirmed, 2 probable) and 3 deaths in the MV Hondius Andes hantavirus outbreak. Since May 7 (when 8 cases were confirmed), 5 additional cases have been identified from former passengers including cases in France and Spain. On May 10, the ship docked in Tenerife, Canary Islands, where 120+ passengers were evacuated and repatriated on flights to six European countries and Canada. US passengers (17) were repatriated on a government medical flight to Offutt Air Force Base in Nebraska and transported to the National Quarantine Center at the University of Nebraska. One French passenger developed symptoms during their evacuation flight. On May 18, the MV Hondius arrived in Rotterdam where all remaining crew were retested, a deceased passenger's body was removed for cremation, and the vessel began disinfection.

200+ Claude Prompts Top Professionals Actually Use at Work

Claude can be your analyst, editor, and strategist.
But most professionals are using it to fix grammar.

These 200+ Claude prompts take it from grammar tool to your most powerful AI work assistant.

Sign up for Superhuman AI and get:

• 200+ ready-to-use Claude prompts to get real work done in minutes — researched, tested, and used by professionals at Google, Microsoft, and NASA

• Superhuman AI newsletter (4 min daily) so you keep learning new AI tools and skills to stay ahead in your career — the prompts are just the beginning

Claim your free prompts

1. What Happened After May 7: The Full Timeline 🚢📅

May 6: The ship leaves Cape Verde for the Canary Islands. Three more people are evacuated from the ship mid-journey.

May 8: The CDC confirms it has deployed a team of epidemiologists to the Canary Islands and a separate team to Offutt Air Force Base in Nebraska to support assessment of returning US passengers.

The US government confirms its top priority is the safe repatriation of American passengers, who are planned to be evacuated on a US government medical repatriation flight to Offutt Air Force Base in Omaha, Nebraska, where they will be transported to the National Quarantine Center at the University of Nebraska.

May 10: The MV Hondius docks in Tenerife, Canary Islands. Passengers disembark and evacuation flights repatriate passengers to six European countries and Canada. One French passenger develops symptoms during their evacuation flight home.

May 13: WHO reports a total of 11 cases including three deaths. Two additional confirmed cases reported from France and Spain since the previous update. One inconclusive result for a case in the United States. The working hypothesis is confirmed: the first case acquired the infection prior to boarding, through exposure on land. Current evidence suggests subsequent human-to-human transmission occurred onboard.

May 15: Former passengers are hospitalized or quarantined in Australia, Canada, France, Germany, Netherlands, Saint Helena, Singapore, South Africa, Spain, Switzerland, Turkey, and the United States.

May 18: MV Hondius arrives in Rotterdam. Everyone is retested and disembarked. The 23 crew from four countries enter quarantine in Rotterdam. The body of a deceased passenger is removed for cremation. The vessel begins disinfection in preparation for returning to service.

May 26: ECDC reports 13 total cases (11 confirmed, 2 probable), 3 deaths. One new case and no new deaths since the previous update.

2. What the New Cases Tell Us About Transmission 🔬🧬

The new cases confirmed since May 7 are significant for one reason.

They confirm what WHO suspected but had not yet stated clearly: current evidence suggests human-to-human transmission occurred onboard the ship.

This matters because it moves the outbreak from "one person brought a virus aboard" to "the virus spread between people on the ship."

It does not change the pandemic risk assessment. The Andes strain requires prolonged close contact to spread person to person. Sitting in the same dining room or sharing a deck does not constitute sufficient exposure.

But it confirms the ship was not merely a vehicle. It was a transmission environment.

The identification of additional cases after former passengers and crew have returned to their home country is expected given the long incubation period of Andes hantavirus and the possibility that some infections occurred on board the ship.

The incubation window of 1 to 8 weeks has not closed for all passengers. Additional cases remain possible until that window closes fully for every person who was on board.

3. The US Response: Quarantine Centers and Government Flights 🇺🇸🏥

The US government response to the 17 American passengers was notable in its scale.

The CDC deployed two separate teams: one to the Canary Islands for on-site risk assessment and one to Offutt Air Force Base in Nebraska to support repatriation. CDC's premier infectious disease experts worked closely with international partners to develop consistent monitoring guidance, distributed to state and local health departments.

The use of the National Quarantine Center at the University of Nebraska Medical Center is significant. This is the same facility used for Ebola patients in 2014 and COVID repatriations in 2020. It is the highest-level civilian infectious disease quarantine facility in the United States.

Deploying it for hantavirus, a disease with no documented US cases in this outbreak, reflects either an abundance of caution or a genuine assessment that the risk profile of Andes virus warrants maximum-security containment.

The Administration confirmed it is using premier health experts to guide the response to this evolving situation and working closely with international partners to provide technical assistance and guidance to mitigate risk.

4. What Happens Next: The Ship, the Passengers, and the Risk 🔭⚖️

The ship: The MV Hondius is listed on Oceanwide Expeditions' website as scheduled to depart on a cruise later in May that would take it to the Arctic for a series of cruises throughout the summer. The company initially said it did not foresee changes to its operations before later indicating it expected clarity on the sailing schedule by end of week.

As of writing, the ship has completed disinfection in Rotterdam and its operational status remains under review.

The passengers: All are being monitored through the end of their individual incubation windows. The French passenger who developed symptoms on the evacuation flight represents the most recent symptomatic case. All five passengers on that flight entered isolation protocols.

The global risk: Both WHO and ECDC maintain their assessment: global public health risk is low. Andes virus does not spread efficiently. The cases are all directly traceable to the ship. There is no community transmission detected anywhere.

The incubation window: The last passengers disembarked on May 10-18. With an incubation period of up to 8 weeks, the window for new cases from the ship exposure does not fully close until mid-July 2026. Health authorities will continue monitoring until then.

The outbreak is not over. It is contained.

Those are different things.

Takeaways

• As of May 26, the ECDC reports 13 total cases (11 confirmed, 2 probable) and 3 deaths, with one new case and no new deaths since the previous update; the ship docked in Tenerife on May 10 where 120+ passengers were evacuated to six European countries and Canada, and arrived in Rotterdam on May 18 where remaining crew were quarantined and disinfection began.

• WHO confirmed that current evidence suggests human-to-human transmission occurred onboard the MV Hondius, meaning the ship was a transmission environment and not just a vehicle; the working hypothesis remains that the index case acquired the virus on land in Argentina before boarding, with cases now confirmed in France, Spain, and potentially the United States from former passengers.

• The incubation window of 1-8 weeks has not fully closed for all former passengers, meaning additional cases remain possible until mid-July 2026; former passengers are being monitored across 13 countries including Australia, Canada, France, Germany, Singapore, South Africa, Switzerland, Turkey, and the United States, while global public health risk remains assessed as low by both WHO and ECDC with no community transmission detected anywhere.

100+ Claude Code hacks to ship code 10X faster

Top engineers at Anthropic say AI now writes 100% of their code.

Are you using AI to write yours?

These 100+ Claude Code hacks show you exactly how. Sign up for The Code and get:

• 100+ Claude Code hacks — free

• The Code newsletter — learn the latest AI tools and skills to code faster in 5 mins a day

Claim your free playbook