免疫与疫苗

区分先天免疫（非特异性、即时）与适应性免疫（特异性、形成记忆）；解释B细胞如何产生识别特定抗原的抗体，T细胞如何摧毁受感染细胞，以及免疫记忆为什么使疫苗有效；并描述肠道微生物组作为数万亿微生物群落对免疫功能的显著影响。

Distinguish innate (non-specific, immediate) from adaptive (specific, memory-forming) immunity; explain how B cells produce antibodies that recognise specific antigens, how T cells destroy infected cells, and why immunological memory makes vaccines work; and describe the gut microbiome as a community of trillions of microbes that significantly influences immune function

学习证据 / Evidence

• 区分先天免疫（快速、非特异性的屏障和炎症）与适应性免疫（缓慢、特异性、形成记忆）
• 解释B细胞如何产生与病原体上特定抗原结合的抗体，标记病原体使其被清除
• 解释免疫记忆：首次接触病原体后，记忆B细胞和T细胞会留存，使再次应答更快、更强——这是疫苗保护作用的基础

• Distinguishes innate immunity (rapid, non-specific barriers and inflammation) from adaptive immunity (slow, specific, memory-forming)
• Explains how B cells produce antibodies that bind to specific antigens on pathogens, targeting them for destruction
• Explains immunological memory: after first exposure, memory B and T cells remain, making subsequent response faster and stronger — the basis of vaccine protection

评估问题 / Assessment

如果{{name}}被问到为什么不会得两次水痘，能否解释单纯击退病菌和真正“记住”病菌之间的区别，并描述疫苗如何在不引起疾病的情况下训练免疫系统？

If {{name}} was asked why they don't get chickenpox twice, could they explain the difference between just fighting off a germ and actually 'remembering' it — and describe how a vaccine trains the immune system without causing the disease?