I know some people are more likely to get angiitis than others. which ones?

Can't predict: Can not tell you how to predict this. There are a variety of types of angiitis from inflammatory - polyangiitis with granulomatosis, allergic granulomatosis, CNS vasculitis, it is an inflammation of blood vessels and is called also vasculitis and can be seen wiht infections like hepatitis, medications, cancers, and even rheumatic diseases. Uncertain i can predict an answer.