Figure 3


Subgroup analyses of the participants for COVID-19 susceptibility/morbidity/mortality by previous histories of URI regarding (A) susceptibility for 1–14 days, (B) 1–30 days (C), and 1–90 days; (D) morbidity for 1–14 days, (E) 1–30 days, (F) and 1–90 days; and (G) mortality for 1–14 days, (H) 1–30 days, and (I) 1–90 days.