News in brief: Acquired haemophilia A with MAB; Hazard ratios for leukaemia in Down syndrome; Blood group link for COVID-19

Rare bleeding complication from MABs in MS Two cases of acquired haemophilia A have been reported as complications of alemtuzumab treatment for multiple sclerosis. The female patients presented with spontaneous bruising, as well as menorrhagia in one patient, about 21 months after their second doses of the monoclonal antibody. APTTs were prolonged and prothrombin times ...

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