Case series of four re-infections with a SARS-CoV-2 B.1.351 variant, Luxembourg, February 2021.

We describe four SARS-CoV-2 re-infections with a B.1.351 variant in 2021, in healthcare workers (HCWs) previously infected in 2020, before detection of this variant in Europe.

Pediatric Life-Threatening Coronavirus Disease 2019 With Myocarditis.

We report the case of a pediatric life-threatening coronavirus disease 2019 who presented as myocarditis with heart failure. Clinicians should be aware of this severe presentation of the disease in children, possibly linked to an exaggerated inflammatory host immune response to severe acute respiratory syndrome coronavirus 2.

Factors determining the percentage of hypochromic red blood cells in hemodialysis patients.

Unlabelled: Factors determining the percentage of hypochromic red blood cells determines iron status in hemodialysis patients.

Background: Determination of the percentage of hypochromic red blood cells (RBC; %HYPO) has been advocated as a sensitive index of functional iron deficiency during erythropoietin (EPO) therapy in hemodialyzed patients.

Methods: The significance of %HYPO in chronic renal failure was evaluated in 64 chronically hemodialyzed patients.