Here are a few options for the description of the WordPress post tag “兒童免疫力” (Child Immunity), written in Traditional Chinese, with slight variations in tone and focus:

**Option 1: Concise & Informative**

> 了解兒童免疫力。 包含如何增強免疫力、常見的免疫系統問題，以及疫苗接種等相關資訊。 為您的孩子提供健康的起點！

> (Translation: Understand child immunity. Includes information on how to boost immunity, common immune system issues, and vaccination. Provide a healthy start for your child!)

**Option 2: Problem-Oriented & Solution-Focused**

> 關注兒童免疫力？ 我們分享提升孩子免疫力的技巧和策略，助您應對過敏、感冒等煩惱，讓孩子健康快樂成長。

> (Translation: Concerned about child immunity? We share tips and strategies to improve your child’s immunity, helping you cope with allergies, colds, and other worries, allowing your child to grow up healthy and happy.)

**Option 3: Educational & Broad**

> 關於兒童免疫力的全面資源。 探索不同年齡階段孩子的免疫系統發展、營養建議、生活方式的影響，以及如何應對疾病和保持健康。

> (Translation: A comprehensive resource on child immunity. Explore the development of the immune system in children of different ages, nutritional advice, the influence of lifestyle, and how to deal with illness and maintain health.)

**Option 4: Keyword-Rich (Useful for SEO)**

> 兒童免疫力, 增強免疫力, 免疫力不足, 免疫系統, 疫苗接種, 預防疾病, 兒童健康, 小兒科. 獲取兒童免疫力相關的專業知識與實用建議。

> (Translation: Child immunity, boost immunity, immune deficiency, immune system, vaccination, disease prevention, child health, pediatrics. Get professional knowledge and practical advice related to child immunity.)

**Choosing the best option:**

* Consider your blog’s overall tone and target audience.
* If you use keywords, make sure they are relevant and natural-sounding.
* Option 4 is suitable if you want to optimize for search engines.
* Option 1 is a good starting point if you are still unsure.

You can modify these descriptions further to suit your specific content and target audience. Good luck!