How many leeches do you think it would take to kill someone?
Okay Anon, let me math this out.
On average, a human body has 5 liters of blood.
A leech can hold, on average, 10 milliliters of blood.
So, switching liters to mL to make the math easier, a human body has 5,000 mL of the red juice inside it.
5,000 divided by 10 mL(per leech) is 500 leeches on the average human body, to kill and drain someone of all of their blood using only leeches and their tiny, ferocious hunger.
Thank you for coming to my Ted Talk about Leeches!
In addition: to just kill someone, and not go into ghoulish overkill, you’d need to have them lose half to two-thirds of their blood, so 250 leeches should do the trick if you’re short on the little suckers.