Xiang Ying washed the crayfish she caught with the tap water from her own spatial dimension.
Her space's water had disinfecting properties because she had once lived through an apocalypse, where the development of water sources was extremely stringent.
As such, the water she could use in her space had gone through multiple filtrations.
Not only did it contain trace elements needed by the human body, it also had water molecules that were the bane of many unknown parasites.
Xiang Ying had washed the crayfish three times thoroughly and snipped off their heads, which were most prone to harboring filth.
Naturally, there was nothing amiss.
But for those who had drunk from the pond, that was another matter.
Xiang Ying did have medicines in her space to treat parasitic infections, and she was about to volunteer her treatment efforts.
That's when she heard Supervisor Ke next to her say, "The way these water bandits are sick, it seems like the same illness as the City Garrison."