Injection Chair
From Feed The Beast Wiki
The inyection chair can be found in a house of an vampire hunter trainer,that house usually is found in villages captured by vampire hunters,to use an inyection chair,u must first pick some garlics,craft an inyection,then fuse them,and use the garlic inyection in the inyection chair.When you do that,you will be poisoned,but when the effect finishes,you will be inmune to the effect,sanguinare vampiris.