BMC Neurology

Table 1 Comparison of AEs frequency after vaccination between the first and the second dose

From: Questionnaire-based study of COVID-19 vaccination induced headache: evidence of clusters of adverse events

		Q2		Sum
		No	Yes	Sum
Q1	No	318	356	674
Q1	Yes	98	630	728
	Sum	416	986	1402

AEs were more frequent after the second vaccination. Question1: Q1, Question2: Q2. Sum: Summary

Back to article page

ISSN: 1471-2377

Contact us

General enquiries: journalsubmissions@springernature.com