聚集性疫情

聚集性疫情是指在一个特定的地理位置或时期内，出现异常和相对不常见的疾病疫情^[1]。通常情况下，当流行病学家意识到可能出现聚集性疫情时，他们会向当地的公共卫生部门报告^[2]。如果聚集性疫情规模进一步扩大，此种情况可能被重新认定为疾病爆发。

参考文献

1. Miquel Porta (编). A Dictionary of Epidemiology. Oxford University Press, USA. 2008: 42–43 [2022-01-03]. ISBN 978-0-19-971815-3. （原始内容存档于2020-11-15）. Aggregations of relatively uncommon events or diseases in space and/or time in amounts that are believed or perceived to be greater than could be expected by chance. Putative disease clusters are often perceived to exist on the basis of anecdotal evidence, and much effort may be expended by epidemiologists and biostatisticians in assessing whether a true cluster of disease exists.
2. Guidelines for Investigating Clusters of Health Events. www.cdc.gov. [21 March 2021]. （原始内容存档于21 March 2021）.