For HR leaders here, it is a timely prompt to review what the Workplace Safety and Health Act demands of them when novel pathogens emerge
Singapore is not watching the world's latest infectious disease crisis from a distance.
When the MV Hondius, a Dutch expedition cruise ship, docked at Tenerife in Spain's Canary Islands on 10 May following a deadly hantavirus outbreak, two of its former passengers were already in isolation at the National Centre for Infectious Diseases (NCID) here. Singapore's Communicable Diseases Agency (CDA) confirmed last Thursday that both men — a 67-year-old Singaporean and a 65-year-old permanent resident, both in their 60s — had been onboard the vessel when it departed Argentina on 1 April, and had also shared a flight with a confirmed hantavirus case from St Helena to Johannesburg on 25 April.
The CDA reported on 7 May that one man had a runny nose but was otherwise well, and the other was asymptomatic. On 9 May, the CDA confirmed that both men had tested negative for hantavirus, including the Andes virus, following testing with multiple samples at the National Public Health Laboratory. As a precaution, both will remain in quarantine for 30 days from the date of last exposure, with re-testing before release and phone surveillance for a further monitoring period — up to 45 days from last exposure, which the CDA describes as the maximum incubation period. "The risk to the general public in Singapore remains low," the agency said.
That assessment reflects the consensus of international health authorities. The World Health Organisation has assessed the risk to the global population as low. The outbreak, which has claimed three lives and infected at least eight people across 23 nationalities, is being managed through a coordinated international response. The CDC in the United States has classified it as a Level 3 emergency.
But "low risk" and "no concern for employers" are not the same thing. For Singapore HR leaders and employers, the involvement of local residents in a multi-country infectious disease response is precisely the kind of scenario that tests whether workplace health and safety frameworks are fit for purpose.
What is hantavirus, and why does the Andes strain matter?
Hantavirus is a family of viruses found primarily in rodents. Human infection typically occurs through inhaling airborne particles from contaminated droppings, urine or saliva of infected animals. The Andes strain, confirmed as the cause of the MV Hondius outbreak, is notable for a specific reason: it is the only known hantavirus documented to spread between people, not just from animal to human.
That human-to-human transmission remains rare, and typically requires prolonged close contact — sharing a bed, physical intimacy, or sustained proximity to a symptomatic patient. But in the enclosed environment of a cruise ship, with shared cabins and communal spaces, it is precisely those conditions that appear to have enabled spread aboard the Hondius.
Symptoms begin like influenza: fever, fatigue, muscle aches, nausea. They can progress rapidly to severe respiratory failure, with the lungs filling with fluid. The CDC puts the mortality rate for those who develop serious respiratory symptoms at 38 per cent, with some clinical estimates reaching higher. Symptoms appear between four and 45 days after exposure — an unusually long incubation window that complicates contact tracing significantly.
The Andes virus is endemic to parts of Argentina and Chile, carried by a specific rodent host found only in that region. This geographic specificity is why Singapore — and Asia more broadly — is not considered at risk of local transmission. The South China Morning Post reported last week that Asian health experts assessed the regional risk as minimal.
The WSH Act framework: what employers owe their workers
For Singapore employers, the applicable legal framework is the Workplace Safety and Health Act (WSH Act). Section 12 of the Act requires every employer to take, so far as is reasonably practicable, such measures as are necessary to ensure the safety and health of employees at work. That duty extends beyond the physical premises of the office.
As HRD Asia has previously reported in its guide to roles and responsibilities under the WSH Act, an employer's duty also encompasses persons not in their direct employ who may be affected by the undertaking carried on in the workplace. And as confirmed by the Ministry of Manpower, that obligation extends to employees working outside the office — including at client sites and, relevantly, overseas.
The Work Injury Compensation Act (WICA) reinforces this point. As HRD Asia has noted in its guide to work injury compensation in Singapore, the MOM has confirmed that an employee's eligibility to claim compensation extends to accidents occurring outside Singapore, so long as they arise out of and in the course of employment. An employee who contracts an infectious disease as a result of work-related travel could, in principle, fall within this framework.
For employers with staff who travel to South America — whether for business development, field research, or expeditions — these obligations are not merely theoretical.
Three areas requiring immediate employer attention
Business travel to South America. Argentina and Chile are popular destinations for both corporate travel and leisure, and some Singapore companies send employees there for work in sectors including agriculture, natural resources, environmental consulting and adventure tourism. Any employee travelling to these countries — particularly for outdoor or rural activities — should be briefed on the current health advisory context and basic precautions around rodent exposure, as recommended by the CDA. Employers should check the Ministry of Foreign Affairs' travel advisories before approving such trips.
Returning travellers and monitoring protocols. Given the 45-day maximum incubation period cited by the CDA, an employee who has recently returned from South America and develops flu-like symptoms warrants prompt medical attention. The CDA's published protocols are clear: individuals who test negative are quarantined for 30 days from last exposure, with phone surveillance for a further monitoring period. Employers should have a clear internal protocol for what happens when a staff member discloses potential exposure to a serious infectious disease — including confidentiality obligations and the process for facilitating medical assessment without undue delay.
DORSCON awareness and readiness. Singapore's Disease Outbreak Response System Condition (DORSCON) framework sets out graduated responses to infectious disease threats across four colour-coded statuses. The framework provides guidance to employers on the measures required at each level. While hantavirus has not triggered a DORSCON elevation, the episode is a useful reminder that employers should be familiar with their obligations under each status. The Ministry of Manpower's health advisories and the Ministry of Health's guidance for specific sectors remain the authoritative reference points.
A culture of safety that starts at the top
Singapore's Ministry of Manpower has invested considerably in driving a workplace safety and health culture that goes beyond compliance. HRD Asia has reported on the MOM's push to make company directors and chief executives personally accountable for WSH outcomes, including through the Code of Practice on Chief Executives and Board of Directors' WSH Duties. As Manpower Minister Tan See Leng has stated, the Courts can consider compliance with that code in assessing culpability when a WSH Act offence occurs.
Infectious disease preparedness sits within that WSH remit, not outside it. The question of whether an organisation's pandemic response plan is adequate — whether it covers novel pathogens, overseas exposure scenarios, and clear escalation protocols — is one that company leadership should be able to answer confidently.
As the MOM has put it, the burden in any WSH prosecution lies with the employer to demonstrate that it took reasonably practicable steps to protect workers. "Employers should never take for granted the severity of any potential injury at the workplace," Gerard Quek, deputy managing partner at PD Legal, has noted previously on HRD Asia. The same principle applies to health risks as to physical ones.
What HR should do now
The risk of hantavirus spreading in Singapore workplaces is, to be clear, extremely low. The two residents in NCID isolation had already returned by the time the outbreak was publicly confirmed, and the CDA has assessed public risk here as low. There is no cause for alarm.
But the episode offers four practical prompts for HR leaders and employers:
Review travel risk protocols for South America. Ensure any employee travelling to Argentina, Chile or neighbouring countries for work is aware of the current advisory context and understands basic precautions: avoiding contact with rodents and their nesting areas, cleaning surfaces with damp rather than dry methods, and maintaining good personal hygiene in rural or outdoor settings, as the CDA recommends.
Establish a clear returning-traveller protocol. Know in advance what your organisation will do if a staff member discloses potential exposure to a serious infectious disease. This includes how to facilitate access to medical assessment, how to manage leave appropriately, and how to handle sensitive health information in accordance with the Personal Data Protection Act.
Test your pandemic response plan. If your organisation updated its infectious disease protocols during Covid-19 but has not revisited them since, now is a reasonable moment to do so. A plan designed for a respiratory virus transmitted by droplets may not adequately address a pathogen with a 42-day incubation window and a different transmission profile.
Communicate calmly and factually. Employees who are aware of the Singapore connection to the MV Hondius outbreak may have questions or concerns. Clear internal communication grounded in official guidance from the CDA and MOM is the appropriate response. Unmanaged anxiety about infectious disease can be as disruptive as the disease itself.
The bottom line
The MV Hondius was carrying passengers and crew from 23 nations, including two Singapore residents, when hantavirus began to spread. The global response has involved 22 countries, multiple governments, the WHO and the CDC. Three people have died.
Singapore's response — the rapid isolation of returning passengers at NCID, coordinated contact tracing, and clear public communication — reflects the kind of institutional readiness that the country built through SARS and refined through Covid-19. Employers here should ensure their own internal frameworks reflect the same standard.
For HR leaders in Singapore, the question is not whether hantavirus will reach the office. It is whether, when the next novel pathogen does demand a response, your organisation knows exactly what to do.
