Adults aged from 18 to 59 years, belonging to one of the following groups: Solid organs transplant recipients - kidney, liver, heart and lung, Chronic Kidney disease pre-transplantation, Liver cirrhosis pre-transplantation, Hematopoietic stem cell transplantation, Cancer in active therapy, Adults with innate immunity errors, diseases with predominant antibody deficiency, Immune-mediated rheumatic diseases, Immunocompetent persons (comparator group)

Adults aged from 18 to 59 years, belonging to one of the following groups: Solid organs transplant recipients - kidney, liver, heart and lung, Chronic Kidney disease pre-transplantation, Liver cirrhosis pre-transplantation, Hematopoietic stem cell transplantation, Cancer in active therapy, Adults with innate immunity errors, diseases with predominant antibody deficiency, Immune-mediated rheumatic diseases, Immunocompetent persons (comparator group)