“…A case series study of thrombocytopenia, including immune thrombocytopenia, after the receipt of mRNA COVID-19 vaccines reported to the Vaccine Adverse Event Reporting System (VAERS), reported a thrombocytopenia rate of 0.80 per million doses for Pfizer and Moderna vaccines. Based on an annual incidence rate of 3.3 ITP cases per 100,000 adults, the observed number of all thrombocytopenia cases, which included ITP, following administration of mRNA COVID-19 vaccines was not greater than the number of ITP cases expected [84]. A review of reports of 20 cases of thrombocytopenia following mRNA SARS-CoV-2 vaccination also suggests that the rate of newly diagnosed ITP is similar to the baseline incidence of ITP [85].…”