9 February 2021. There is increased risk of COVID-19 transmission among familial members in Wuhan, China. The transmissibility and pathogenicity of the SARS-CoV-2 virus may increase after person-to-person transmission. There is an related higher attack rate and the worse clinical outcomes in COVID-19 family clusters.https://www.ijidonline.com/article/S1201-9712(21)00106-5/fulltext