If you drink spoiled milk, it can cause food poisoning, and be dangerous for small kids with weak immune systems.
Who is at risk?
Small children a babies are at most risk because their immune system haven't fully developed.
Anyone who buys milk and leaves it out. And small helpless children.
The victim in this case a human, that leaves milk out. They will most likely get sick, also can get food poisoning. In some cases it can be worse for small children who immune systems haven't fully developed.
Where can it be found?
It can be found in milk that has been left out in warm temperature.
You can prevent this by making sure you put the fridge and not leave it out.
Treatment is time.