Alliance for Pandemic Preparedness

May 4, 2021

Clinical Characteristics and Transmission of COVID-19 in Children and Youths During 3 Waves of Outbreaks in Hong Kong

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  • Among 397 individuals aged ≤18 years with confirmed COVID-19 during the first 3 waves in Hong Kong (January to December 2020), imported infections comprised 79% and 93% of all cases during the first and second wave, respectively, but domestic infections comprised 73% of all cases during the third wave. Overall among domestic infections, 91% had a known history of contact with an infected individual, of which 90% were family members. While schools were intermittently closed nationally during the study period, only 3 cases were associated with in-school transmission.

Chua et al. (May 3, 2021). Clinical Characteristics and Transmission of COVID-19 in Children and Youths During 3 Waves of Outbreaks in Hong Kong. JAMA Network Open. https://doi.org/10.1001/jamanetworkopen.2021.8824