Spillover
Human health belongs inside ecology.
Big Idea
Quammen shows that diseases crossing from animals to people are ecological events shaped by contact, evolution, and changing environments.
Crossing Species
Spillover occurs when a pathogen infects a new kind of host.
Reservoir Hosts
A pathogen may persist in an animal population without causing the same illness it causes in humans.
Changing Contact
Human activity can alter where people, domestic animals, and wildlife encounter one another.
From Infection to Outbreak
A cross-species infection does not automatically become sustained transmission between people.
Following the Evidence
Researchers combine field observations and laboratory work to reconstruct disease pathways.
- The book is not a diagnosis guide or a precise prediction of a particular pandemic.
Khizooo Take
Treat disease prevention as a question about environments and contact patterns as well as about individual pathogens.
Remember
Cross-species infection is a relationship, not an animal’s moral failing.