Thalassemic patients were found to present a higher prevalence of anti-HAV IgG antibodies than matched healthy subjects from the same geographic area. This finding is difficult to explain, but it may be attributed to the higher vulnerability of thalassemics to HAV infection and to passive transfer of anti-HAV antibodies by blood transfusion.

Beta-thalassemia is a serious, potentially life-threatening disease that affects red blood cells, cells that carry oxygen via hemoglobin throughout the body. As part of the SardiNIA Study of Aging, supported by the National Institute on Aging (NIA), a component of the National Institutes of Health, scientists have found a genetic variant in the BCL11A gene that can explain why some people with beta-thalassemia seem to be protected from most dangerous symptoms.