When the first transplant patient at Royal Prince Alfred Hospital tested positive for a fungal infection on 3 December 2025, clinicians were not initially alarmed. Organ recipients on immunosuppression drugs are vulnerable to opportunistic infections, and one or two cases a year are not unusual. A second case six days later changed everything.
As the Sydney Morning Herald reports, clinical teams at RPA urgently reviewed their patient records and found four more cases stretching back to October, forming a cluster of six infections. Two of those patients died. The culprit was Aspergillus, a common environmental mould that poses little threat to healthy people but can be devastating for the immunocompromised. According to the SMH, one in three immunocompromised patients who contract an Aspergillus infection dies within 90 days, a statistic consistent with research showing mortality rates among solid organ transplant recipients can exceed 40 per cent in the first year after infection.
The prime suspect is the hospital's own $940 million redevelopment, which has been underway next to the transplant ward. According to the US Centers for Disease Control and Prevention, hospital construction can trigger Aspergillus outbreaks by increasing the amount of airborne spores. At RPA, air monitoring on the construction site between September and December 2025 showed no issues of concern, the SMH reports, but formal testing of the transplant unit itself found mould levels roughly ten times higher than other parts of the hospital. Additional testing on 19 January 2026 revealed widespread mould and water damage across at least four floors.
On Christmas Eve 2025, NSW Chief Health Officer Dr Kerry Chant convened an expert panel to formally declare the cases a cluster. The ward was promptly closed, staff and patients were relocated, and air filtration systems were inspected and upgraded. The transplant unit reopened with new ante chambers on 9 February 2026. An expert panel from the Centre for Disease Control is expected to examine how the spores bypassed existing controls in the ward.
A two-month information gap
The political fallout has been sharp. Health Minister Ryan Park told budget estimates he was not briefed on the cluster until early February 2026, roughly two months after the expert panel met. The SMH reports that Park was not informed when he returned from leave in early January, and that the public only learnt of the deaths when the newspaper itself reported them. Opposition health spokeswoman Sarah Mitchell, whose office had been examining ten boxes of documents on hospital maintenance, seized on the timeline, suggesting the information became public only because her office had filed a parliamentary document request that would have uncovered the deaths regardless.
Sydney Local Health District chief executive Deb Willcox has defended the handling of the cluster, saying the expert panel chaired by Chant advised that a public statement was not necessary because "the situation was under control." Air sampling had shown the air was clear, she said, and those directly affected, including patients, families, and clinical staff, were fully informed. Mitchell has called it a cover-up; Park has strenuously denied any deliberate concealment, saying authorities "didn't want to unnecessarily concern the community about a mould that exists in the environment."
Both positions carry some weight. Transparency in public health events is fundamental to public trust, and a two-month gap between a declared cluster and public disclosure is difficult to defend on purely clinical grounds. At the same time, health departments face a real tension between informing the public and generating disproportionate anxiety about risks that, for most people, are negligible. The question is whether the threshold for public disclosure was set in the right place.
A symptom of a broader problem
This incident is not simply a story about one hospital. The SMH reports that many of NSW's 4,400 hospital buildings are ageing, water-damaged, and in some cases riddled with vermin. A snap review triggered by the RPA cluster found 38 unresolved non-routine maintenance issues still outstanding from 2025, including pigeon infestations at Tamworth and RPA, and five hospitals needing roof repairs. Flies, cockroaches, birds and possums were reportedly found in major Sydney and Central Coast hospitals, including Westmead and Royal North Shore, between 2012 and 2019, without being publicly reported.
Premier Chris Minns acknowledged directly that the state of NSW's hospitals was not acceptable, pointing to a $10 billion, four-year investment in the health system as evidence the government was acting. Park has made a similar point repeatedly: RPA is a 150-year-old institution, and the very redevelopment suspected of causing this cluster exists precisely because the building was no longer fit for purpose.
That tension sits at the heart of this story. Hospitals across Australia, not just in NSW, face the same dilemma: ageing infrastructure must be renewed, but major construction work in and around facilities housing the state's most vulnerable patients carries real clinical risk. Commonwealth and state health departments will need to grapple seriously with infection-control standards for construction adjacent to high-dependency wards, a problem that will only grow as Australia's hospital building stock continues to age. Reasonable people can debate where responsibility lies in this particular case. What is harder to dispute is that the system as a whole was not adequately prepared for a risk that, in hindsight, was entirely foreseeable.