J&J to cooperate in study of rare clots linked to COVID-19 vaccine, German scientist says

FILE PHOTO: A vial and sryinge are seen in front of a displayed Johnson&Johnson logo in this illustration taken January 11, 2021. REUTERS/Dado Ruvic/Illustration

ZURICH (Reuters) - A German scientist studying extremely rare blood clots linked to AstraZeneca's COVID-19 vaccine said on Tuesday Johnson & Johnson has agreed to work with him on the research after similar serious side effects emerged in recipients of its shot.

Andreas Greinacher, a transfusion medicine expert at Greifswald University, announced the collaboration after the European Medicines Agency said it would add a label to J&J's vaccine warning of unusual blood clots with low platelet counts. AstraZeneca's shot has a similar warning.