Okay, here are a few options for the description of a WordPress tag named “抗體” (Antibody) in Traditional Chinese, ranging in detail and emphasis:

**Option 1: Concise & Informative (Best for general use)**

* **Description:** 針對病原體或異物的免疫蛋白。 (A type of immune protein that targets pathogens or foreign substances.)

**Option 2: Slightly More Detailed**

* **Description:** 免疫系統產生的蛋白質，用於識別和中和( neutralization)病毒、細菌和其他入侵身體的外來物質。 (Proteins produced by the immune system to identify and neutralize viruses, bacteria, and other foreign substances invading the body.)

**Option 3: Focus on Applications (For medical or health blogs)**

* **Description:** 抵抗感染的關鍵蛋白質，在診斷、治療和疫苗開發中扮演重要角色。 (Key proteins that combat infections, playing an important role in diagnosis, treatment, and vaccine development.)

**Option 4: Emphasis on the Tag’s Purpose within the Blog**

* **Description:** 關於抗體、免疫反應和抗體相關研究的相關文章標籤。 (A tag for articles related to antibodies, immune responses, and antibody-related research.)

**Key Considerations when Choosing:**

* **Audience:** Who are you writing for? The medical professional or the general public?
* **Blog Content:** What types of articles are you tagging with “抗體”?
* **SEO:** Include relevant keywords, like “免疫系統” (immune system) or specific pathogens if applicable.
* **Brevity:** WordPress tag descriptions are often displayed in small areas of your site.

Remember to choose the option that best fits the particular context of your website. Good luck!