Here are a few options for the description of a WordPress post tag titled “免疫力失調” (Immune Disorder) in Traditional Chinese, ranging in detail and tone:

**Option 1: Simple & Concise**

* **Description:** 免疫系統功能異常，導致身體抵抗疾病的能力下降。 (Immune system malfunction, leading to a decrease in the body’s ability to fight diseases.)

**Option 2: More Informative**

* **Description:** 免疫力失調指的是免疫系統無法正常運作，可能包括免疫力過強（如過敏、自體免疫疾病）或免疫力低下，使身體更容易受到感染。 (Immune disorder refers to the immune system’s inability to function properly, which may include an overactive immune response (such as allergies, autoimmune diseases) or a weakened immune response, making the body more susceptible to infection.)

**Option 3: Focusing on Symptoms and Issues**

* **Description:** 探討免疫力失調的各種狀況，包括：反覆感染、疲勞、關節疼痛、消化系統問題等。了解成因、診斷方式及治療方法。 (Exploring the various conditions related to immune disorders, including: recurrent infections, fatigue, joint pain, digestive issues, etc. Learn about the causes, diagnostic methods, and treatment approaches.)

**Option 4: SEO Friendly (For Search Engines)**

* **Description:** 關注免疫力失調：了解免疫系統異常、免疫力低下、過敏、自體免疫疾病的症狀、原因及治療。 查找相關資訊，獲取改善健康的實用建議。 (Focus on Immune Disorders: Learn about the symptoms, causes, and treatment of immune system problems, weakened immunity, allergies, and autoimmune diseases. Find relevant information and get practical advice to improve your health.)

**Considerations When Choosing:**

* **Target Audience:** Who are you writing for? Are they medical professionals or the general public?
* **Post Content:** What kind of posts will be tagged with this? This should be reflected in the description.
* **Character Limit:** WordPress tag descriptions have a character limit, so adjust accordingly.

I recommend choosing the description that best suits your WordPress post’s content and your overall goals. The SEO-friendly option (option 4) is a good overall choice. Remember to adjust the tone or detail level based on your specific needs.