Table 1.

Acute Hepatitis B Virus Infection in Women of Childbearing Age, 2011–2017

Test Year	All Women			Birth-dose Cohort			Adolescent-dose Cohort			Partial-vaccination Cohort
	Sample Size	Number of Positive Tests	%	Sample Size	Number of Positive Tests	%	Sample Size	Number of Positive Tests	%	Sample Size	Number of Positive Tests	%
2011	329 092	90	0.03	26 574	0	0.00	151 432	29	0.02	151 086	61	0.04
2012	325 848	110	0.03	35 104	3	0.01	154 746	34	0.02	135 998	73	0.05
2013	312 249	88	0.03	41 714	6	0.01	151 135	23	0.02	119 400	59	0.05
2014	343 140	107	0.03	55 620	2	0.00	168 063	44	0.03	119 457	61	0.05
2015	368 195	94	0.03	71 774	4	0.01	182 378	41	0.02	114 043	49	0.04
2016	419 506	140	0.03	97 163	11	0.01	206 705	58	0.03	115 638	71	0.06
2017	436 569	154	0.04	117 285	10	0.01	212 828	66	0.03	106 456	78	0.07
Total	2 534 599	783	0.03	445 234	36	0.01	1 227 287	295	0.02	862 078	452	0.05

Acute infection was defined as a hepatitis B surface antigen and, concurrently, either a hepatitis B core immunoglobin M antibody or a serum alanine aminotransferase ≥250 U/L.