Pseudomonas aeruginosa is a common environmental bacterium that can become a serious health threat when it infects humans. Recognized by the WHO as a critical pathogen, it has evolved in ways that make it particularly dangerous. In a recent podcast, I spoke with researcher Aaron Weimann about the genetic changes that have enabled Pseudomonas to thrive in the human body. This conversation sheds light on the importance of microbial surveillance to prevent future outbreaks.