Severe headaches common after smallpox vaccination

According to published research from the United States, "Headaches are common following smallpox vaccination; the re-introduction of civilian vaccination necessitates better understanding of the clinical features and outcome of post-vaccination headache. We identified patients reporting headache following vaccination from among those reported to the U.S. Vaccine Adverse Events Reporting System to characterize demographic and clinical features. One-hundred and eight reports were obtained from among 627 smallpox vaccine-related reports, including 15 hospitalized persons."

"None had neurologic...

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