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Quick drop of platelet counts in children with chronic immune thrombocytopenia after COVID-19 mRNA vaccination: case
Giuseppe Lassandro1, Francesco Carriero1, Valentina Palladino1
1Department Interdisciplinary of Medicine, Pediatric Unit "B. Trambusti", University of Bari "Aldo Moro", Bari, Italy.
Abstract:
Immune thrombocytopenia (ITP) is an autoimmune disorder characterized by isolated thrombocytopenia. Many viruses and some vaccines have been identified as triggering the autoimmune process, including parvovirus, human immunodeficiency virus, Epstein-Barr virus, rubella, and measles. However, ITP in association with coronavirus disease 2019 (COVID-19) vaccination has not been reported so far. We describe the cases of two young girls affected by ITP presenting a quick reduction of platelet count after receiving Pfizer-BioNTech COVID-19 vaccine.

