MV Hondius hantavirus: key numbers and future threats
Timestamp shown in UTC unless otherwise indicated.
The outbreak in numbers
The first international Andes hantavirus outbreak via a cruise ship is over. 13 cases, 3 deaths. Fatality rate — 23%.
33 countries participated in contact tracing. 653 people under monitoring. 317 high-risk, 336 low-risk.
The main success — zero confirmed secondary transmission cases outside the ship. The virus did not spread further.
Final statistics
| Indicator | Value |
|---|---|
| Confirmed cases | 12 |
| Probable cases | 1 |
| Deaths | 3 |
| Countries and territories monitoring | 33 |
| High-risk contacts | 317 |
| Low-risk contacts | 336 |
| Hospitalized | 10 |
| Recovered and discharged | 8 |
| Still in treatment | 2 |
| WHO risk assessment | Low → outbreak closed |
How coordination worked
The European Union activated the EWRS early warning system on May 2. The same day WHO received the notification.
The Health Security Committee — an EU body — met regularly. It coordinated evacuation, repatriation, testing, and information exchange.
The EU Health Task Force sent an expert aboard the ship off Cape Verde. The specialist helped with epidemiological investigation and safe passenger disembarkation.
WHO coordinated 33 countries through the International Health Regulations mechanism. PAHO provided diagnostic protocols. CDC deployed field teams in Nebraska and Argentina.
PAHO: lessons for the Americas
In June 2026, PAHO held a regional workshop in Panama. The topic — strengthening surveillance for hantavirus and hemorrhagic fevers.
In 2025, eight countries in the region reported 229 confirmed HPS cases and 59 deaths. In 2026 — already 94 cases in the first half of the year.
'Recent events, such as the cruise ship outbreak, underscore the need to keep technical capabilities up to date and strengthen intersectoral collaboration,' said Andrea Vicari, Head of Infectious Hazard Management at PAHO.
Lessons for the cruise industry
One ship. 23 nationalities on board. Passengers spread across four continents. Incubation period — up to six weeks.
The MV Hondius outbreak revealed the vulnerability of the global system. Cruise companies are reviewing protocols. Medical equipment on ships, communication with health authorities, evacuation plans — all need improvement.
'What made this operation unique was the level of coordination required. We had to develop and execute a controlled biosecurity response within a very short timeframe.' — Marcel van den Brink, EWS Group
Scientific work continues
Virus samples are being studied in laboratories worldwide. Complete Andes virus genomes have already been sequenced. This will help develop tests, treatments, and potential vaccines.
Andes virus is the only hantavirus with confirmed human-to-human transmission. Understanding this mechanism is key to future prevention.
The outbreak is over. But the scientific work is just beginning.
- 12 confirmed cases, 1 probable
- 3 deaths (CFR 23%)
- 653 contacts in 33 countries
- 317 high-risk, 336 low-risk
- 8 recovered, 2 in treatment
- Zero secondary transmission
The main takeaway
The system worked. WHO, ECDC, CDC, PAHO, national health authorities across 33 countries — everyone did their job.
But it is too early to relax. Hantavirus remains in nature. Argentina and Chile — endemic zones. In the US, Sin Nombre virus kills every year.
The question is not whether the next outbreak will come. The question is when — and how ready we are.