Absence of blood donors' anti-SARS-CoV-2 antibodies in pre-storage leukoreduced red blood cell units indicates no role of passive immunity for blood recipients.

Transfer of vaccine antibodies (Ab) from donors to recipients after transfusion of packed red blood cells (RBC) is supposed, thus affecting the recipients' response to vaccinations. In this prospective study, SARS-CoV-2 IgG level in donors' serum and RBC supernatant samples was assessed. Among 346 subjects, 280 were referred for hyperimmune plasma donation and 30 for whole blood donations.

Response to Measles, Mumps and Rubella (MMR) Vaccine in Transfusion-Dependent Patients.

Measles, mumps and rubella (MMR) still determine significant morbidity and mortality, although a highly effective vaccine is available. Postponing the MMR vaccination until 6 months after the last red blood cell (RBC) transfusion is recommended, but this delay is incompatible with chronic transfusions. The present study aimed at investigating the impact of blood transfusions on the immunogenicity of the MMR vaccine.

[Enlargment of Virchow-Robin spaces in cranial trauma: literature review].

In this review it is discussed the role of mild traumatic brain injury as a cause of Virchow-Robin spaces (VRS) pathological enlargement. Anatomy and physiology of normal VRS, and their immunological role are described. Special attention is given to magnetic resonance imaging findings of both normal and enlarged perivascular spaces.

[The cerebral perivascular spaces: review of the literature on diffuse or focal expansion].

Virchow-Robin spaces (VRS) are pial-lined, interstitial fluid-filled structures that do not directly communicate with the subarachnoid space, accompany penetrating arteries and veins and can be visualized on magnetic resonance imaging. This article reviews the imageology characteristics, the functions, the causes and the relation with neurological disorders of VRS.