Table 2.

Adverse immunization reactions by timing of pertussis immunization among pregnant and delivering women in the US, 2010–2014.

Outcome	Follow-up length post-immunization	Immunization timing	Total N	Cases	Unadjusted Risks (per 10,000 women)
Anaphylaxis	2 days	Total	207,851	1	0.00
		Early	25,035	0	0.00
		Optimal	123,780	0	0.00
		Postpartum	59,038	1	0.17
Fever	3 days	Total	207,821	129	6.2
		Early	25,033	13	5.19
		Optimal	123,760	47	3.80
		Postpartum	59,028	69	11.69
Cellulitis	7 days	Total	207,822	122	5.87
		Early	25,030	43	17.18
		Optimal	123,763	27	2.18
		Postpartum	59,029	52	8.81
Pain in limb	7 days	Total	207,663	503	24.22
		Early	25,001	92	36.80
		Optimal	123,441	217	17.58
		Postpartum	59,004	194	32.88
Encephalopathy	42 days	Total	207,853	12	0.58
		Early	25,037	0	0.00
		Optimal	123,777	7	0.57
		Postpartum	59,039	5	0.85
Guillain-Barré Syndrome	42 days	Total	207,857	0	0.00
		Early	25,037	0	0.00
		Optimal	123,780	0	0.00
		Postpartum	59,040	0	0.00