Here are a few options for a WordPress post tag description in Traditional Chinese for “免疫球蛋白”, catering to slightly different needs:

**Option 1: Simple & Direct**

* **Description:** 免疫球蛋白 – 一種重要的抗體，參與身體的免疫反應，保護您免受疾病侵害。
* **Translation:** Immunoglobulins – An important antibody, involved in the body’s immune response, protecting you from disease.
* **Use Case:** Useful for a general audience. Clear and concise.

**Option 2: More Detailed (for a slightly more informed audience)**

* **Description:** 免疫球蛋白 (Ig) – 由漿細胞產生的蛋白質，在體內作為抗體驗，與特定抗原結合，促進免疫反應，如中和病毒、激活補體系統等。了解不同類型的免疫球蛋白 (IgG, IgM, IgA, IgE, IgD) 及其功能。
* **Translation:** Immunoglobulins (Ig) – Proteins produced by plasma cells that act as antibodies in the body. They bind to specific antigens, promoting immune responses such as neutralizing viruses and activating the complement system. Learn about the different types of immunoglobulins (IgG, IgM, IgA, IgE, IgD) and their functions.
* **Use Case:** Better for a blog post that will delve into the details. Uses some medical terminology but still maintains accessibility.

**Option 3: Focus on Practical Impact**

* **Description:** 免疫球蛋白 – 您的免疫系統的重要組成部分，研究如何維持健康的免疫球蛋白水平，以及了解與免疫球蛋白相關的疾病，如免疫缺陷症。
* **Translation:** Immunoglobulins – An essential component of your immune system. Learn how to maintain healthy immunoglobulin levels, and understand diseases associated with immunoglobulins, such as immunodeficiency.
* **Use Case:** Emphasizes the practical side, good for articles on preventative medicine or common health concerns.

**Option 4: Short & SEO optimized**

* **Description:** 免疫球蛋白 (Ig) – 抗體在抵抗疾病中的作用。
* **Translation:** Immunoglobulins (Ig) – Antibody’s role in fighting disease.
* **Use Case:** Short, sweet, and good for search engine optimization (SEO) – can be paired with the actual post’s title’s keyword.

**Key Considerations when Choosing:**

* **Target Audience:** Who are you writing for? Adjust the level of detail and the terminology accordingly.
* **Purpose of the Tag:** What kind of content is associated with this tag? Is the post going to be a simple overview or a complex discussion?
* **Character Count:** WordPress tag descriptions may have character limits. Check the limit within your specific theme or WordPress setup.
* **Keyword Optimization:** Try to include relevant keywords for search engine visibility.

I recommend choosing the option that best suits your specific WordPress post and your desired audience. Good luck!