"So surprisingly, things which historically were known to be present in the city and then over time have thought to have been eradicated or at least reduced. So for example, we see a highly diverse assemblage of bartonella which is a bacterial pathogen of concern. We also see Leptospira, which is something which if it goes untreated, again, a bacterial pathogen of concern, it would be fatal. We see remarkably things that we associate in far-flung areas like Hanta virus that are endemic to the city," said Blum.