Of the 262 patients, 176 (67.2%) were defined as clustered cases, 133 (50.8%) were considered family cluster cases, and 43 (16.4%) were classified as “other” clustered cases. Median cluster size was 3.

University of Michigan - Ann Arbor

Cluster transmission has been noted in many COVID-19 studies
It is characterized by infections that are concentrated within a given area, often within families or social circles 

Cluster Transmission of COVID-19

Tian, S., Hu, N., Lou, J., Chen, K., Kang, X., & Xiang, Z. et al. (2020). Characteristics of COVID-19 infection in Beijing. Journal Of Infection, 80(4), 401-406. https://doi.org/10.1016/j.jinf.2020.02.018

https://www.journalofinfection.com/article/S0163-4453(20)30101-8/pdf

Characteristics of COVID-19 infection in Beijing

Family clustering occurred for all infected infants. 
Families of all 9 infants had at least one infected family member.
All infants' infections occurred after the family member's infection.

Family Clustering of Cases of COVID-19 in Infants in China

Clustering of COVID-19 Cases in Beijing, China

- At least 235 (56%) of 417 cases reported in Shenzhen were from clusters
- 80% of these clusters were among households


Cluster transmission in First-wave COVID-19 transmissibility and severity in China outside Hubei after control measures, and second-wave scenario planning: a modeling impact assessment

Cluster Transmission of COVID-19 References by Journal

- Asia
- Africa
- North America
- South America
- Antarctica
- Europe
- Australia

Learn Before

Related