Hello, iam Susan Mistrot, Have a blessed day.
Is Iosefkas Blood Vial Infinite? [Solved]
An unlimited amount can be given by Iosefka at the door, as long as the player does not already have a Iosefka’s Blood Vial in his/her inventory, and she will keep giving them away until Father Gascoigne is slain in combat.
[wiki] Testing Iosefka’s Blood Vial effects on cooperators
Using
Bloodborne [Iosefka’s Blood Vial]
The following video shows how to obtain the item
Bloodborne 20 Blood Vials in 4 Minutes Easy Farming No-BS Guide
This is my first NO-BS Guide for Bloodborne starting with a quick and easy way to farm for
