Table 1.

Reclassification regime of cases.

Original classification	Reclassified classification	Number of cases (N=3512)
Imported cases	Imported cases	1045
Local cases	Local cases	901
Possibly local cases	Local casesa	2
Possibly local cases	Imported casesb	71
Possibly local cases	Unclassified casesc	30
Close contact of imported cases	Local	31
Close contact of local cases	Local	1370
Close contact of possibly local cases	Local	62

^aCases without travel history during the 14 days before their first symptom onset.

^bCases that had travel history during the 14 days before their first symptom onset and were not involved in any local cluster.

^cCases who either had travel history during the 14 days before their first symptom onset and were linked to a local cluster or did not have an onset/arrival date.