community transmission
noun [ U ] uk/kəˌmjuː.nə.ti trænzˈmɪʃ.ən/ us/kəˌmjuː.nə.t̬i trænˈsmɪʃ.ən/ (also community spread)
（传染病）社区传播
the process of an infectious illness spreading through a large group of people in a general way, so that the source of the infection in a particular case is not known
Of 20 confirmed cases in the county, 14 were travel-related, three were from contact with a confirmed case, and three were from community transmission. 在县里的20个确诊病例中，14例与旅行相关，3例因与1名确诊患者接触而感染，另有3例属社区传播。
Public health measures were put in place to slow the community spread of Covid-19. 采取了公共卫生方面的措施，以延缓Covid-19的传播。
- More examples
- Evidence suggests community transmission of pandemic influenza was well established in the state at that time.
- I think it's inevitable that we will see community transmission. At this stage all we can do is contain the disease as long as possible.
- Virological surveillance documented sustained community transmission from the latter half of June 2009.
- She said, "The outbreak is serious but we hope for it to remain contained in hospitals, so we don't have community spread."
- He wrote a paper on community spread of Legionella pneumophila (Legionnaire's disease).