There are many different forms of vasculitis, and the VCRC is focusing on studying six different types: eosinophilic granulomatosis with polyangiitis (Churg-Strauss) (CSS), giant cell arteritis (GCA), granulomatosis with polyangiitis (Wegener's) (GPA) (WG), microscopic polyangiitis (MPA), polyarteritis nodosa (PAN), and Takayasu’s arteritis (TAK). Although it is not possible to study each individual type of vasculitis separately with limited resources, our hope is that information learned in studying several types of vasculitis will be beneficial for understanding and treating other types of vasculitis as well.