Compiled by the ENCLAI research team following a documented methodology · Editorial oversight: Dr Natalya Mathur, Founder · Data last updated: (UTC)

Hepatitis B in Puerto Rico: 2026 cases and outbreak reports

Reported hepatitis b surveillance for Puerto Rico (PRI) — — latest record 2026-10-25

What the 2026 data shows

As of 25 October 2026, Puerto Rico has reported 98 Hepatitis B cases in 2026, compiled from figures published by CDC NNDSS Weekly Notifiable Diseases (State-Level). The full year 2025 closed at 91 cases.

Of the 24 countries reporting hepatitis b to ENCLAI in 2026, Puerto Rico accounts for 0.0% of reported cases and ranks 15 by case count.

ENCLAI has logged 125 surveillance records for hepatitis b in Puerto Rico in 2026, with the most detailed reporting in Mar 2026 (15 records). 9 of those arrived in the last 30 days; the case counts run to 2026-10-25. 1 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: CDC NNDSS Weekly Notifiable Diseases (State-Level)

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Surveillance summary

2026 cases (YTD)
98
2025 cases (full year)
91
Baseline avg (3yr)
N/A
Trend (2025)
—
No comparable earlier years

Reported cases by year, Puerto Rico

YearReported casesShare of worldwide reports
2023 not reported —
2024 not reported —
2025 91 0.0%
2026 (year to date) 98 0.0%

Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting hepatitis b to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.

Surveillance records logged in 2026

MonthRecordsReporting sources
Jan 202681
Feb 2026121
Mar 2026151
Apr 2026121
May 2026151
Jun 2026121
Jul 2026121
Aug 2026151
Sep 2026121
Oct 2026121

A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases. 9 records were logged in the last 30 days.

Sub-national reporting, 2026

Areas within Puerto Rico with the most hepatitis b records this year:

AreaRecords
Puerto Rico125

Hepatitis B in other countries, 2026

Country2026 casesTrend
China 328,749
United States 19,931 ▲ Rising · 2025
Australia 4,650 ▲ Rising · 2025
Germany 2,830 ▼ Declining · 2025
Poland 2,827 ≈ Stable · 2025

Other diseases reported in Puerto Rico, 2026

Disease2026 casesTrend
Chlamydia infection 2,012
Hepatitis C 1,335
Dengue fever 940
Gonococcal infection 442
Non-typhoidal salmonellosis 331

Questions about this page

How many Hepatitis B cases has Puerto Rico reported in 2026?
As of 25 October 2026, Puerto Rico has reported 98 Hepatitis B cases in 2026, compiled from figures published by CDC NNDSS Weekly Notifiable Diseases (State-Level). The full year 2025 closed at 91 cases.
Where does Puerto Rico publish Hepatitis B surveillance data?
The counts on this page were published by CDC NNDSS Weekly Notifiable Diseases (State-Level). ENCLAI compiles and normalises them and is not affiliated with these authorities.

About this data

Figures are reported case counts as published by the originating health authorities, compiled by ENCLAI from 444 verified surveillance sources. Puerto Rico figures reflect the reporting available to ENCLAI; reporting periods and case definitions differ between sources, and a missing report does not establish zero cases. ENCLAI holds hepatitis b records for Puerto Rico dated from 2025. How we verify and update data: methodology & Trust Center · understanding case counts.

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The daily disease brief

One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.

Double opt-in — we send a confirmation link and nothing else until you click it. One-click unsubscribe on every email. See our privacy notice.