HomeMy WebLinkAboutperinatal-hepb-factsheet-2024-adaWANG
Alameda County Perinatal
Hepatitis B Annual Fact Sheet 2024
Overview
Hepatitis B can be transmitted from a pregnant individual with hepatitis B to an infant during and after delivery. The
Alameda County Perinatal Hepatitis B Prevention Program identifies pregnant individuals with hepatitis B and ensures their
infants receive timely vaccination and follow-up care. The program continues to focus on supporting these populations
through culturally responsive outreach, language access, and coordinated infant follow-up to prevent transmission and
improve health outcomes.
106
146
103
0
20
40
60
80
100
120
140
160
202420232022
Number of Pregnant Individuals
Year
Number of Pregnant Individuals with
Hepatitis B by YearNumber of Pregnant Individuals with Hepatitis B
in Alameda County, 2024
Percent
Number of Pregnant
Individuals (N=106)
0.0%0< 25 yrsAge Group
9.4%1025-30 yrs
36.8%3931-35 yrs
34.9%3736-40 yrs
15.1%1641-45 yrs
*
0.0%
<5
0
46-50 yrs
> 50 yrs
8.5%9African American/BlackRace/Ethnicity
71.7%76Asian
34.9%37Chinese
6.6%7Filipino
20.8%22Vietnamese
9.4%10Other Asian**
*<5Pacific Islander
*<5Hispanic/Latina/o/x/e
*<5White
15.1%16Unknown
* Categories with <5 annual counts are unstable and are not presented due to privacy
** Includes Afghan, Burman, Cambodian, Indian, Mongolian, and Yemeni
Demographics
In 2024, 106 pregnant individuals with hepatitis
B were reported in Alameda County. Cases were
distributed throughout Alameda County; Of
these, 98 pregnant individuals had a current or
prior Alameda County address and are therefore
represented in the geographic distribution map.
Twenty-seven pregnant individuals
were not eligible for complete
program follow-up due to pregnancy
loss or relocation outside of the
county during pregnancy or the infant
follow-up period.
For questions or additional information, contact
Alameda County Public Health Department
Perinatal Hepatitis B Prevention Program
1100 San Leandro Blvd, San Leandro. CA 94577
Phone: (510) 267-3230 | Fax: (510) 667-7978
https://acphd.org/hep-b
Last Updated January 1st, 2026
During the reporting period, 87 of the
106 pregnant individuals were
enrolled in the Perinatal Hepatitis B
Prevention Program prior to delivery.
Opportunities remain to strengthen
early prenatal identification and
reporting by obstetric providers,
which is essential for timely care
coordination and prevention of
perinatal hepatitis B transmission.
82%
18%Reported
before birth
Reported
after birth
WANG
Number of infants born to
individuals with hepatitis B 65
For questions or additional information, contact
Alameda County Public Health Department
Perinatal Hepatitis B Prevention Program
1100 San Leandro Blvd, San Leandro. CA 94577
Phone: (510) 267-3230 | Fax: (510) 667-7978
https://acphd.org/hep-b
Last Updated January 1st, 2026
Infant Follow-Up Outcomes for Infants born in 2024
These data represent infants born during the 2024 calendar year to individuals with hepatitis B, regardless of when the
pregnancy was reported. Nearly all infants received timely prophylaxis and completed their vaccine series, showing strong
coordination between providers and public health. However, only about half received the second dose within 60 days, and
81% completed post-vaccination serologic testing (PVST), highlighting ongoing opportunities to improve timeliness and
follow-up.
Number of infants who completed
hepatitis B Vaccine #264
Summary
Alameda County’s Perinatal Hepatitis B Program continues to demonstrate strong prevention outcomes, with nearly all
infants receiving post-exposure prophylaxis (PEP) and timely vaccination within 24 hours of birth. In 2025, electronic
reporting was implemented to strengthen data accuracy. This enhancement is expected to improve monitoring and
follow-up for both mothers and infants in future reporting periods.
Despite these successes, post-vaccination serologic testing (PVST) rates remain lower than desired, primarily due to
scheduling and follow-up challenges. Continued provider engagement is essential to ensure timely testing and complete
reporting. Providers play a key role in preventing perinatal hepatitis B transmission by maintaining up-to-date reporting
and encouraging families to complete infant testing on schedule.
To report pregnant individuals with hepatitis B, please fax the Confidential Morbidity Report (CMR)to (510) 667-7978.
With ongoing collaboration and a shared focus on equity, Alameda County remains committed to eliminating perinatal
hepatitis B transmission and improving outcomes for all affected families.
Number of infants who completed
hepatitis B Vaccine Series64
Number of infants completing hepatitis B
vaccine and eligible for PVST64
(Among infants born to individuals with hepatitis B during the 2024, as of October 2025)
Infant Follow-Up Outcomes for Infants born in 2023
These data represent infants born to individuals with hepatitis B during the 2023 calendar year. Timely birth prophylaxis
and high vaccine completion rates demonstrate the program’s sustained success in preventing perinatal transmission.
PVST completion reached 92%, reflecting improved results for this older cohort with additional time for follow-up. Due
to state policy, infants that are older than two years without completing PVST are consider as “lost to follow-up”; in this
cohort, 6 out of 86 follow-up management activities (7%) were closed based on the documented reason.
98%
100%
HBIG received at birth
HBV #1 received at birth
100%
53%
Completed within 120 days
Completed within 60 days
94%
100%
Completed within 270 days
Completed within 365 days
81%
81%
Tested for hep B infection
Tested immune to hep B
Number of infants born to
individuals with Hepatitis B 86
Number of infants who completed
hepatitis B Vaccine #286
Number of infants who completed
hepatitis B Vaccine Series86
Number of infants completing hepatitis B
vaccine and eligible for PVST86
(Among infants born to individuals with hepatitis B during the 2023, as of October 2025)
99%
100%
HBIG received at birth
HBV #1 received at birth
100%
57%
Completed within 120 days
Completed within 60 days
99%
100%
Completed within 270 days
Completed within 365 days
92%
92%
Tested for hep B infection
Tested immune to hep B