The Indonesian Ministry of Health has confirmed that two individuals previously suspected of contracting hantavirus have tested negative and have fully recovered. The announcement comes amid heightened public anxiety following reports of a hantavirus outbreak aboard an international cruise ship.
Aji Muhawarman, Head of the Communications and Public Information Bureau at the Ministry of Health, stated that the two suspects have recovered. While the ministry did not disclose the specific locations of these suspected cases, officials emphasized that hantavirus is not a new phenomenon within Indonesia.
Hantavirus Trends in Indonesia
According to data from the Ministry of Health, Indonesia recorded 23 confirmed hantavirus cases between 2024 and the 16th week of 2026, with three of those cases resulting in death. The distribution of these cases spans nine provinces, with the highest concentrations found in Jakarta and the Special Region of Yogyakarta, which recorded six cases each, followed by West Java with five cases.
Single cases were also identified in the following regions:
- West Sumatra
- Banten
- West Kalimantan
- East Java
- East Nusa Tenggara
- North Sulawesi
The ministry noted that all confirmed infections in the country involved the Seoul strain of the virus. The timeline of infections shows a significant increase in 2025, with one case recorded in 2024, 17 in 2025, and five additional cases by mid-2026.
Distinguishing Local Strains from International Outbreaks
The recent surge in public concern is linked to an outbreak on the expedition cruise ship MV Hondius, operated by Oceanwide Expeditions. The vessel, which departed from Ushuaia, Argentina, on April 1, 2026, carried 147 passengers and crew from 23 different countries. During its voyage—which included stops in Antarctica, South Georgia, Tristan da Cunha, and Saint Helena—several passengers developed respiratory symptoms and fever.
The situation escalated when hantavirus infections were confirmed; one adult woman died in Johannesburg, South Africa, after being evacuated, and another passenger remains in intensive care.
However, health experts clarify that the risk of a similar large-scale outbreak in Indonesia remains limited. Professor Dominicus Husada, a tropical infection expert from the Faculty of Medicine at Airlangga University and the Indonesian Pediatrician Association, explained during a May 8, 2026, briefing that the strains found in Indonesia differ from the Andes virus reported in South America.
“This Andes virus doesn’t exist in Indonesia. We’ve never found it here,” Professor Husada stated, adding that transmission in Indonesia has occurred only through rodents and not between humans. He noted that hantavirus research in the country dates back to 1984, reinforcing that the disease is not a new discovery for local health authorities.
Understanding the Threat and Prevention
The World Health Organization (WHO) defines hantaviruses as zoonotic viruses carried by rodents, such as mice and rats. Humans typically contract the virus through exposure to contaminated saliva, urine, or droppings. Depending on the strain, the infection can manifest as:
- Hantavirus Pulmonary Syndrome (HPS): Affects the lungs and may lead to respiratory failure.
- Hemorrhagic Fever with Renal Syndrome (HFRS): Affects the blood vessels and kidneys.
Common early symptoms include fatigue, muscle pain, headaches, fever, and gastrointestinal issues. Currently, there is no vaccine or specific antiviral treatment for hantavirus; medical care is limited to supportive treatments such as fluid management, oxygen therapy, ventilator support, and kidney treatment.
Preventive Measures
Experts stress that prevention is the most effective defense. The public is advised to:
- Maintain clean environments and reduce rodent populations.
- Store food securely to avoid attracting rats and mice.
- Ventilate rooms that have been closed for long periods before entering.
- Use gloves, masks, and disinfectants when cleaning areas contaminated by rodent urine or droppings to avoid inhaling viral particles.
Government Response and Future Outlook
The Indonesian government is currently utilizing the Early Alert and Response System (SKDR) to monitor cases and is tracking travelers arriving from affected countries. Authorities are promoting Clean and Healthy Living Behaviours (PHBS) to mitigate risks.
Looking forward, the government may continue to increase surveillance of arriving travelers to prevent the introduction of foreign strains. Because the local Seoul strain does not exhibit human-to-human transmission, experts suggest that the risk of a widespread epidemic remains relatively low, provided that rodent control and sanitation efforts are maintained.
