CDCP1 and COVID-19: In this way, causal associations of a higher level of CDCP1 with a decrease in the risks of being hospitalized with COVID-19 and of developing critical COVID-19 does not contradict an observation that elevation of this biomarker was also found in the serum of patients recovering from the most severe forms of COVID-19 at a time point of 45 days after a discharge from a hospital (30).