mega cluster; very large cluster (of a virus); large concentrated outbreak
Wasei-eigo term used especially in epidemiological contexts to describe a large cluster of infections or a major outbreak. Often used in news reports about COVID-19 and similar diseases.
wasei-eigo (Japanese-coined English), from mega cluster
A mega cluster occurred in this area, causing a sharp rise in infections.
Experts said that urgent measures are needed to prevent the mega cluster from spreading.
Variant spelling with an interpunct; less common but seen in some sources.
Wasei-eigo from English 'mega' + 'cluster'. It is wasei, meaning it was coined in Japan rather than borrowed directly from English.