* patient with corticosteroids as background treatment (≥ 10 mg equivalent) * patient under supplemental oxygen \> 6 l/min * immunocompromised patient (aids, bone marrow or solid organ transplants, etc.) * patient who received a corticosteroid dose within 3 days for covid-19 * medical history of hypersensitivity to prednisolone or dexamethasone; or lactose / galactose (excipients with known effect) * another active virus such hepatitis, herpes, varicella, shingles .... * psychotic state not controlled by treatment

* patient with corticosteroids as background treatment (≥ 10 mg equivalent) * patient under supplemental oxygen \> 6 l/min * immunocompromised patient (aids, bone marrow or solid organ transplants, etc.) * patient who received a corticosteroid dose within 3 days for covid-19 * medical history of hypersensitivity to prednisolone or dexamethasone; or lactose / galactose (excipients with known effect) * another active virus such hepatitis, herpes, varicella, shingles .... * psychotic state not controlled by treatment

- patient with corticosteroids as background treatment (≥ 10 mg equivalent) - patient under supplemental oxygen > 6 l/min - immunocompromised patient (aids, bone marrow or solid organ transplants, etc.) - patient who received a corticosteroid dose within 3 days for covid-19 - medical history of hypersensitivity to prednisolone or dexamethasone; or lactose / galactose (excipients with known effect) - another active virus such hepatitis, herpes, varicella, shingles …. - psychotic state not controlled by treatment

- patient with corticosteroids as background treatment (≥ 10 mg equivalent) - patient under supplemental oxygen > 6 l/min - immunocompromised patient (aids, bone marrow or solid organ transplants, etc.) - patient who received a corticosteroid dose within 3 days for covid-19 - medical history of hypersensitivity to prednisolone or dexamethasone; or lactose / galactose (excipients with known effect) - another active virus such hepatitis, herpes, varicella, shingles …. - psychotic state not controlled by treatment