Smelling Something Dangerous May Put The Immune System on High Alert

<img width="1024" height="415" src="https://www.sciencealert.com/images/2024/08/RoundwormSmell.jpg" alt="Smelling Something Dangerous May Put The Immune System on High Alert"/>A pre-emptive response.

https://www.sciencealert.com/smelling-something-dangerous-may-put-the-immune-system-on-high-alert