Type II hypersensitivity, which produces antibodies against host tissue; and type III hypersensitivity, which is caused by the antigen-antibodies complex, is the cause of the tissue injury.

II 型超敏反应，产生针对宿主组织的抗体；由抗原抗体复合物引起的III型超敏反应是组织损伤的原因。

IgA nephropathy is therefore a type III hypersensitivity disorder, meaning that pathology and inflammation will happen at the site the immune complexes deposit, not where they are formed.

因此IgA肾病是一种III型超敏反应，意味着病理和炎症反应会发生在免疫复合物沉积的地方，而不是发生在免疫复合物形成的地方。