Great Ormond Street Institute of Child Health, University College London, London, UK.
Nat Rev Immunol. 2022 Jun;22(6):333-334. doi: 10.1038/s41577-022-00725-0.
Herd immunity, where a pathogen can no longer efficiently spread in a population, is achieved when a large proportion of the population becomes immune, making the spread of infection from person to person unlikely and protecting those without immunity. Despite the global spread of SARS-CoV-2, the failure of virus- and vaccine-induced immunity to prevent transmission, combined with the emergence of antigenically distinct variants, has made herd immunity to SARS-CoV-2 unachievable thus far. Where does this leave us?
群体免疫是指当人群中有很大一部分人具有免疫力时，病原体在人群中就无法有效地传播，从而使人与人之间的感染传播不太可能发生，并保护那些没有免疫力的人。尽管 SARS-CoV-2 在全球范围内传播，但病毒和疫苗诱导的免疫未能阻止传播，加上出现了具有不同抗原性的变异株，使得迄今为止无法实现 SARS-CoV-2 的群体免疫。这让我们处于何种境地？
