Here are a few options for descriptions, catering to different focuses, for the WordPress post tag “抗原” (Antigen) in Traditional Chinese:

**Option 1: Concise and General**

* **Description:** 了解抗原的相關資訊。 (Learn about information related to antigens.)

**Option 2: Focusing on Medical Context**

* **Description:** 有關抗原在醫學、免疫學及疾病檢測上的應用。 (Information on the application of antigens in medicine, immunology, and disease detection.)

**Option 3: Explaining its Role in Immune Response**

* **Description:** 探索抗原如何觸發身體免疫反應，以及其在診斷和預防疾病中所扮演的角色。 (Explore how antigens trigger the body’s immune response and their role in diagnosing and preventing diseases.)

**Option 4: For a More Technical Audience**

* **Description:** 圍繞抗原、抗體及免疫反應的相關討論，包括抗原的結構、分類和其在免疫學研究中的重要性。 (Discussions related to antigens, antibodies and immune response, including the structure, classification and importance of antigens in immunological research.)

**Option 5: A Short and Sweet Alternative**

* **Description:** 關於抗原的相關文章。 (Articles related to antigens.)

**Recommendation:**

I would recommend **Option 2 or 3** as they are clear and helpful, and provide enough context for the tag without being overly complicated. The *best* option really depends on the overall content of your site. If you often discuss medicine and disease detection, go for option 2. If you talk more general immunology and biological processes, Option 3 is great.