Dong D, Luo Z, Zheng Y, Liang Y, Zhao P, Feng L, Wang D, Cao Y, Zhao Z, Ma Y (2022) Application of deep learning-based diagnostic systems in screening asymptomatic COVID-19 patients among oversea returnees. J Infect Dev Ctries 16:1706–1714. doi: 10.3855/jidc.15022