变异株是怎么产生的,为什么要关注?
How do variants arise and why do we track them?
病毒复制时随机突变,少数突变可能增强传播或逃逸免疫,形成变异株;监测它们有助于及时调整疫苗与防控措施。
Viruses mutate randomly as they copy; a few changes may spread better or dodge immunity, forming variants. Tracking them helps update vaccines and controls.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
《默克家庭医学手册》Merck Manual Home Health Handbook 中译版,人民卫生出版社
The Merck Manual Home Health Handbook, Chinese ed., PMPH
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787117181631(按标识回读: 默克家庭医学手册)
#变异株 #突变 #监测
群体免疫阈值和R0有什么关系?
How is the herd-immunity threshold linked to R0?
阈值约等于 1 减 1/R0;R0越高,需要接种疫苗或曾感染的比例就越大,才能切断传播链。
The threshold is roughly 1 - 1/R0. The higher the R0, the larger the share that must be immune (via vaccine or prior infection) to break transmission.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Fine, Eames, Heymann,《"Herd Immunity": A Rough Guide》,Clinical Infectious Diseases,2011 (DOI: 10.1093/cid/cir007)
Fine, Eames, Heymann, '"Herd Immunity": A Rough Guide', Clinical Infectious Diseases, 2011, DOI: 10.1093/cid/cir007
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1093/cid/cir007
#群体免疫 #R0 #疫苗
什么是用“污水监测”来追踪传染病?
What is wastewater surveillance for infections?
通过检测污水中的病原核酸,可提前发现社区感染趋势,尤其适用于无症状传播,是一种低成本的“哨点”手段。
Testing sewage for pathogen genetic material can reveal community infection trends early - especially for silent spread - as a low-cost sentinel tool.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
《默克家庭医学手册》Merck Manual Home Health Handbook 中译版,人民卫生出版社
The Merck Manual Home Health Handbook, Chinese ed., PMPH
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787117181631(按标识回读: 默克家庭医学手册)
#污水监测 #传染病 #预警
接触者追踪为什么能放慢疫情?
Why does contact tracing slow an outbreak?
通过找到并管理感染者接触过的人,可在其发病前就隔离,切断传播链,为疫苗和医疗争取时间。
By finding and managing people an infected person touched, you isolate them before they spread - cutting chains and buying time for vaccines and care.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
《默克家庭医学手册》Merck Manual Home Health Handbook 中译版,人民卫生出版社
The Merck Manual Home Health Handbook, Chinese ed., PMPH
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787117181631(按标识回读: 默克家庭医学手册)
#接触者追踪 #隔离 #防控
什么是基本传染数R0?
What is the basic reproduction number R0?
R0指在无人免疫、无防控措施时,一个感染者平均会传染的人数;R0大于1疫情会扩大,小于1则会消退。
R0 is the average number one infected person spreads to when no one is immune and no measures are taken. Above 1 an outbreak grows; below 1 it fades.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注:著录含书名,但缺版次 / 出版社 / 年份中的一部分,需编辑补全后才能做独立比对。
Heesterbeek 等《基本传染数 R0:一个工具箱》(Journal of the Royal Society Interface, 2002)
Heesterbeek et al., R0: a toolbox (Journal of the Royal Society Interface, 2002)
#R0 #传染 #流行病学