What defines a zoonosis?

A zoonosis is defined as a disease that is naturally transmitted from animals to humans. This definition highlights the direct connection between animal health and human health, emphasizing the importance of understanding how diseases can leap from non-human animals to people. Many zoonotic diseases can be transmitted through direct contact with an infected animal, through bites, or through consumption of contaminated animal products.

Recognizing the role of zoonoses in public health is vital, especially as we consider the impact of wildlife and domestic animals on the spread of infectious diseases. This understanding reinforces the significance of monitoring animal health and implementing preventive measures to protect human populations.

The other options do not accurately describe zoonoses: exposure to contaminated water relates to waterborne diseases, diseases affecting only human populations pertain to human-specific infections, and vaccines may prevent certain diseases but do not define the nature of their transmission between species.