TABLE 2.

Nursing home residents monitored for adverse events 14 days pre‐ and post‐ mRNA COVID‐19 vaccine booster dose from September 22, 2021 through February 16, 2022.

	14‐day Rates
	Pre‐Booster, n = 10,116		Post‐Booster, n = 10,863
	n	Per 100,000 residents	n	Per 100,000 residents
Total
Acute Myocardial Infarction (AMI)	2	19.8 (5.4,72.1)	0	No cases
Stroke, ischemic	5	49.4 (21.2115.7)	0	No cases
Seizure	1	9.9 (1.7, 56.0)	0	No cases
Venous thromboembolism (VTE)	1	9.9 (1.7, 56.0)	0	No cases
Pulmonary Embolism (PE)	1	9.9 (1.7, 56.0)	0	No cases

Note: Residents with a positive COVID‐19 test within 20 days of vaccination or on monoclonal antibodies within 90 days of booster to prevent detection of adverse events attributable to viral infection or treatment were excluded (to be comparable rates with boosted rates) and to prevent detection of adverse events attributable to viral infection or treatment.