What is a spillover event in zoonotic disease?

A pathogen passing from animal reservoirs to humans.

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  1. A pathogen passing from animal reservoirs to humans ✔
  2. A vaccine being stored too long
  3. A farm animal changing fields

Why: Zoonotic diseases frequently emerge through spillover, when pathogens pass from animal reservoirs to humans.

Huh, didn't know that: Zoonotic diseases frequently emerge through spillover, when pathogens pass from animal reservoirs to humans.

The dad joke
Spillover is when germs jump ship to a new host.
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References

Answer: A pathogen passing from animal reservoirs to humans. Zoonotic diseases frequently emerge through spillover, when pathogens pass from animal reservoirs to humans.

  1. Zoonosis en.wikipedia.org/wiki/Zoonosis
    spillover events, in which pathogens are transmitted from animal reservoirs to human populations
    Checked 2026-11-07.

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