It was noted that source of infection and levels of serum albumin were shown to be the most important predictors of hypovitaminosis C. Patients who had infection originated from abdomen were more likely to have hypovitaminosis C. Moreover, lower albumin level was a significant factor in the model against hypovitaminosis C. We further developed a WeChat based mini program named “HYPOVC” for bedside application (Supplemental Fig. S4). Here, ALB is linked to infection.