Studies reported that age and laboratories indicators such as lactate dehydrogenase,pro calcitonin and D_dimer are early indicators of severe COVID_19 .shortness of breath at admission,past histories of Diabetes and Heart diseases and abnormality in 28 indicators such as CD4 percentage and CRP ,indicate that the patient is already severely ill or has a significant progression to severe condition.

Article Re The source of elevated plasma D‐dimer levels in COVID‐19 infection

Article Could ferritin level be an indicator of COVID-19 disease mortality?

Serum ferritin is an important inflammatory marker in patients with covid19.

As the serum ferritin levels is high the disease expected to be more severe.

Regarding to the D- dimer test if the result is high the patients with covid19 will be at a higher risk to have an embolism like DVT, STROKS , PULMONARY EMBOLISM, even MI and sudden death.