Bilirubin levels in patients with mild and severe Covid-19: a pooled analysis

The letter comments on a recent commentary published in Liver International entitled "COVID-19 and liver disease" by Sun et al., and describes a pooled analysis of data on bilirubin levels in patients with and without severe Covid-19. This is the first pooled analysis of data on bilirubin in Covid-19 patients. The results evidence that bilirubin levels are significantly associated with the severity of the disease.