Psoriasis is a chronic, genetic, non-contagious skin disorder that appears in many different forms and can affect any part of the body, including the nails and scalp.

牛皮癣是一种慢性，遗传，不具有传染性皮肤疾病，即出现在许多不同的形式，可以影响身体任何部分，包括指甲及头皮。

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Bluetongue is a non-contagious virus spread by a species of midge and is most commonly seen in the late summer and autumn.

BBC: Vets detect new bluetongue virus

There's no telling when, or if, treatment will make him non-contagious.

NPR: Developing New Drugs for Infectious Disease