By Nicolas Hulscher, MPH

A new study by Salmaggi et al found among 8,821,812 Italians that COVID-19 vaccination increased the risk of several serious neurological diseases:

• Ischemic Stroke: IRR 1.44 [95% CI: 1.34–1.54]

• Cerebral Hemorrhage: IRR 1.50 [95% CI: 1.32–1.70]

• Transient Ischemic Attack (TIA): IRR 1.67 [95% CI: 1.46–1.91]

• Myelitis: IRR 2.65 [95% CI: 1.49–4.70]

• Myasthenia Gravis: IRR 1.71 [95% CI: 1.29–2.28]

The majority of patients hospitalized for neurological diseases in 2021 received at least 1 vaccine dose: