Epidemiological investigation on the first family aggregation epidemic of corona virus disease 2019 in Yangzhou

ObjectiveTo explore the transmission pattern of corona virus disease 2019 (COVID-19) in the population by describing an imported case of novel coronavirus infected pneumonia epidemic situation.

MethodsUsing the method of field investigation, epidemiological investigations were carried out for the imported COVID-19 case and the close contacts related to this epidemic cluster.Data were collected concerning the date of onset, isolation of the case and close contacts.The novel coronavirus nucleic acid was collected from the throat swabs of the case and close contacts.These samples were detected by real-time fluorescence quantitative RT-PCR.

ResultsIn this epidemic cluster, there was one confirmed case, that had been exposed to 36 people (12 in the family and 24 outside the family) and 2 in the family were nucleic acid positive and diagnosed as asymptomatic infections.

ConclusionCOVID-19 transmission proves to be mainly through respiratory droplets and close contact, which easily causes family aggregation epidemic.