New One Health model ties spillover, microbiomes and governance into a single early-warning framework

Some of the most consequential health threats of the modern era do not begin in hospitals or laboratories. They begin at the boundaries where human activity, animal populations and the environment intersect: a farm carved out of forest, a wet market where species mix, a warming landscape that lets mosquitoes push into new territory. A new review published in the journal Microbiome and One Health argues that the global health community has spent decades treating these boundary events as isolated emergencies, when in fact they are symptoms of a single, interconnected system whose condition can be measured, monitored and managed. The paper, led by researchers at Wenzhou Medical University’s Institute of One Health, traces the intellectual history of the One Health approach and then proposes something the field has lacked: a formal model that links the biological and institutional drivers of global risk into one framework capable of generating earlier warnings.

The model, which the authors call an interface-resilience framework, rests on three pillars. The first is spillover pressure, the sum of forces that push pathogens across the species boundary and into human populations. The second is microbial community stability, the resilience of the vast microbial ecosystems that inhabit humans, animals, plants, soil and water. The third is governance connectivity, the capacity of institutions, sectors and nations to share data, coordinate surveillance and act in concert. What makes the model distinctive is its explicit claim about how these three dimensions interact: systemic health risk is expected to be greatest when spillover pressure is high, microbial resilience is low and governance systems are poorly connected. Risk, in other words, is not a property of any single factor but of their configuration.

This framing represents a subtle but important departure from how outbreak preparedness is usually conceived. Conventional approaches tend to focus on detecting pathogens once they have already crossed into humans, then containing them through case isolation, contact tracing and, where available, vaccination. The interface-resilience model shifts the analytical focus upstream, to the conditions that determine whether a pathogen encounter becomes a spillover event, whether a spillover becomes an outbreak, and whether an outbreak becomes a pandemic. By quantifying pressure, resilience and connectivity as distinct but coupled variables, the framework gives public health authorities a set of indicators that can be tracked continuously, long before a pathogen has a name.

The review grounds this argument in a sweeping historical arc. One Health, as a formal term, is relatively recent, but the insight that human, animal and environmental health are entangled is old. The authors revisit the lessons of plague and rabies control, two of the oldest sustained efforts in disease management, both of which required intervening in animal reservoirs and environmental conditions rather than simply treating human patients. Plague control demanded an understanding of rodent populations and flea vectors; rabies control depended on managing dog populations and, eventually, wildlife reservoirs. These campaigns, the review argues, were One Health in practice long before the term existed, and they demonstrate that integrated approaches can succeed when the ecological dimensions of disease are taken seriously.

From that historical foundation, the review moves through the modern catalogue of threats that have made One Health urgent. SARS and COVID-19 demonstrated how rapidly a zoonotic virus can exploit global travel networks. H5N1 avian influenza continues to circulate across wild bird and poultry populations, repeatedly raising the specter of adaptation to efficient human transmission. Mosquito-borne diseases are expanding their geographic range as climate change alters vector habitats. Antimicrobial resistance, which the review treats as a quintessential One Health problem, accumulates at the interface of human medicine, veterinary practice and agricultural environments, where antibiotic use in one sector selects for resistance that ultimately threatens all of them. Food- and pet-associated zoonoses add further pathways by which pathogens move between species in everyday life.

One of the more technically interesting contributions of the review is its treatment of microbial communities as a variable in their own right. The human microbiome, the gut flora of livestock, the soil and water microbial ecosystems of agricultural landscapes: these communities are not passive backdrops to disease but active modulators of it. A stable, diverse microbial community can suppress pathogen overgrowth, compete for resources and buffer hosts against invasion. Conversely, disruption of these communities, whether through antibiotic overuse, land degradation, chemical contamination or dietary homogenization, can lower the barrier to pathogen establishment. By placing microbial community stability alongside spillover pressure in the model, the authors make the case that microbiome degradation is a form of systemic risk accumulation, one that unfolds gradually and largely invisibly until it compounds a pathogen threat.

The third pillar, governance connectivity, addresses a failure mode that became painfully visible during the COVID-19 pandemic: the fragmentation of information and authority across sectors and borders. Human health ministries, veterinary services, environmental agencies and agricultural departments often operate in silos, with separate data systems, separate mandates and separate budgets. When a pathogen moves across the human-animal-environment interface, it moves faster than the institutional response can reorganize. Governance connectivity, in the model’s terms, measures the ability of these sectors to share surveillance data, coordinate risk assessment and execute joint action. The review suggests that poor connectivity is not merely an inefficiency but a multiplier of risk, because it delays detection and response precisely when speed matters most.

The review does not remain at the level of theory. It examines practical experience from China, a country whose scale and density of human-animal-environment interactions make it a critical testing ground for integrated approaches. The authors document experience in integrated disease management, in the control of antimicrobial resistance, in sustainable vector control that reduces reliance on chemical insecticides, in food-safety governance and in ecological management. These case studies serve a dual purpose: they demonstrate that cross-sector coordination is operationally feasible, and they illustrate the kinds of institutional arrangements, data flows and regulatory instruments that the governance-connectivity pillar of the model requires. The Chinese experience, the review suggests, offers transferable lessons for other regions confronting similar interface pressures.

The practical payoff of the interface-resilience model, if adopted, would be a shift toward preventive, data-driven health governance. Instead of waiting for outbreaks to trigger emergency responses, health systems would continuously monitor the three dimensions of the model: tracking land-use change, wildlife-livestock contact rates, climate-driven vector expansion and trade flows as indicators of spillover pressure; monitoring microbial community composition and diversity across humans, animals and environments as indicators of resilience; and auditing the interoperability of surveillance systems as an indicator of governance connectivity. Where indicators trend toward the high-risk configuration, interventions could be deployed preemptively, whether that means regulating wildlife trade, restoring degraded habitats, stewarding antibiotic use or building cross-sector data platforms.

The review arrives at a moment when the costs of fragmented thinking are difficult to ignore. Pandemics, antimicrobial resistance, vector-borne disease expansion and microbiome disruption are usually studied by separate communities of researchers, funded by separate programs and managed by separate institutions. The interface-resilience model offers a common analytical language for all of them, one that makes explicit how biological pressure, ecological resilience and institutional capacity combine to determine systemic risk. The authors, affiliated with Wenzhou Medical University’s Institute of One Health, position the framework as a step toward an integrated global health architecture spanning humans, animals and the environment. Whether the model’s indicators can be operationalized at scale remains a question for future work, but the conceptual contribution is clear: the health of humanity is not a standalone variable, and the systems that protect it must be designed with the same interconnectedness that characterizes the threats themselves.

Subject of Research: One Health framework integrating pathogen spillover, microbiome stability and governance for global health risk assessment

Article Title: One Health model links spillover, microbiomes and governance to global risk

Article References: One Health model links spillover, microbiomes and governance to global risk. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: One Health, spillover, microbiome, zoonoses, governance, surveillance, antimicrobial resistance, H5N1, COVID-19, vector-borne disease, public health, global health