80 and over    adult    aged    asymptomatic diseases*    betacoronavirus / genetics*    china / epidemiology    coronavirus infections / diagnosis*    coronavirus infections / epidemiology    coronavirus infections / virology    disease outbreaks*    doi:10.1016/j.rmed.2020.106026    female    humans    lihui yang    lung / diagnostic imaging*    male    medline    middle aged    ming gao    national center for biotechnology information    national institutes of health    national library of medicine    ncbi    nih    nlm    non-u.s. gov't    pandemics    pmc7219423    pmid:32513410    pneumonia    pubmed abstract    research support    rna    tomography    viral / analysis*    viral / diagnosis*    viral / epidemiology    viral / virology    x-ray computed    xinglin gao    young adult