Neurologic adverse events associated with smallpox vaccination in the United States – response and comment on reporting of headaches as adverse events after smallpox vaccination among military and civilian personnel

Table 1 Variation in headache rates as a function of type of adverse event reporting and of type of sample

	Type of Adverse Event Reporting
Type of Sample	Passive	Active
Military	< 0.016% [1]	18.1% [8]
Mixed Military and Civilian	0.014% [1]	26.2% [9]
Mostly Civilian	-	28.4% [12]
Civilian	0.283% [11]	44.2% [10]

ISSN: 1741-7015