One Health is an interdisciplinary approach built on a simple but profound insight: the health of people, animals, plants, and the environment are not separate — they are one interconnected system.
The word "health" tends to make us think of hospitals, doctors, and medicine. But health — real, lasting health — is shaped by far more than what happens in a clinic.
The air we breathe, the food we eat, the animals we live alongside, the ecosystems that surround us — all of these influence whether we stay well or fall ill. A drought that disrupts farming changes what people eat and how animals are kept. Changes in animal keeping change which pathogens circulate. Pathogens that circulate in animals can cross into human populations. And the way human populations respond to illness is shaped by culture, behaviour, and social trust — not just biology.
This is what One Health recognises: that human health, animal health, plant health, and environmental health share the same biological foundations — the same pathogens, the same ecosystems, the same genetic and ecological factors that determine risk. They cannot be fully understood, or effectively protected, in isolation from one another.
One Health is therefore not a single discipline. It is a way of working — bringing together medicine, veterinary science, environmental science, agriculture, and social sciences and humanities to address challenges that no single field can solve alone. It requires collaboration across sectors, across borders, and across scientific communities that have historically worked apart.
This approach is increasingly recognised as essential. The World Organisation for Animal Health (WOAH) has stated clearly that the interconnectedness of animal, human, and environmental health underscores the urgent need to prepare for unpredictable scenarios that could quickly escalate into disasters. The EU has embedded One Health thinking into its key strategies on health, food safety, and security.
At the One Health Centre, this integrated approach is not a framework we aspire to. It is how we work.