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The number of reported daily COVID-19 cases belonging to clusters ≥5 cases and the government-administered social distancing level in 2020. Cases are categorized into 4 types of clusters: type I – small size <30 cases, short duration <2 weeks; type II – small size <30 cases, long duration ≥ 2 weeks; type III – medium size 30-99 cases, long duration ≥ 2 weeks; and type IV – large size ≥100 cases, long duration ≥ 2 weeks).
