<p>We identified 1690 AESI among 1553 patients. The most common AESI were thrombocytopenia without thrombosis (1001/1690, 59%), generalized convulsion (415/1690, 25%), and myocarditis (98/1690, 6%). COVID-19 vaccination documentation was available for 302/1690 (18%) case-patients, with 10/302 (3%) occurring within a 42-day risk window of vaccination. Of the cases in the risk window, one case (generalized convulsion) was determined by the AEFI committee to be causally associated with a COVID-19 vaccine.</p>