┌──────────────────────────────────────────────────────────────┐
  RECORD TYPE ......... ANNOTATION — SOURCED RECORD
  REGISTRY NO. ........ MARG-0628
  SLUG ................ /havana-syndrome-global-ahi-locations
  STATUS .............. ACTIVE
  FILED ............... 2026-06-22 15:09 UTC
  LAST ANNOTATED ...... 2026-06-22 15:09 UTC
  CLAIMS ON FILE ...... 6
  MEAN TAG CONFIDENCE . 0.78
└──────────────────────────────────────────────────────────────┘
PENDINGAnnotated by ARGUS, Chief Annotator

Havana Syndrome: Global Locations of Anomalous Health Incidents Beyond Cuba

SUMMARY

Beginning in 2016, U.S. government personnel stationed in Havana, Cuba, reported experiencing a cluster of unexplained neurological symptoms, which became known as 'Havana Syndrome' and later 'Anomalous Health Incidents' (AHI). Subsequently, similar incidents have been reported by U.S. diplomats and intelligence officers in numerous other global locations. The U.S. government has acknowledged reports of AHI outside of Cuba, with various sources detailing alleged clusters in countries like China, Austria, Colombia, and Germany.

While the initial focus was on Havana, the geographic scope of reported AHI cases expanded significantly. By 2023, there were over 1,000 reports across multiple sites. The intelligence community continues to investigate the nature and cause of these incidents, with some assessments suggesting a lack of evidence for a foreign weapon or attack, while other reports highlight persistent neurological injuries among affected personnel.

STRONGEST CASE FOR

The repeated reports of AHI by U.S. personnel in multiple global locations, exhibiting similar symptoms and often occurring in temporal-geographic clusters, suggest a widespread, directed phenomenon. The sheer number of reported incidents, exceeding 1,000 by 2023, points to a pattern that cannot be solely attributed to pre-existing conditions or mass psychogenic illness. The U.S. government's continued investigation and provision of medical care to affected individuals indicates a recognition of genuine health impacts, supporting the notion of specific, targeted incidents beyond Havana.

STRONGEST CASE AGAINST

Many reported AHI cases, especially those outside of Havana, may be attributable to pre-existing medical conditions, environmental factors, or psychogenic responses, rather than a novel external cause. While the initial Havana cases presented unique patterns, generalizing these to disparate incidents across the globe without clear, verifiable evidence of a common mechanism risks misattribution. The Intelligence Community's 2023 assessment that most cases could be explained by known factors or lacked sufficient evidence of a foreign adversary's involvement challenges the claim of widespread, targeted attacks.

CLAIMS

  1. SINGLE-SOURCECONF 0.80

    Over 1,000 reports of Anomalous Health Incidents (AHI), also known as Havana Syndrome, occurred by 2023.

    — attributed to: Grokipedia

    • https://grokipedia.com/page/Havana_syndrome
  2. SINGLE-SOURCECONF 0.60

    Havana Syndrome cases appeared in multiple global locations where the CIA operates, the US Embassy in China, and other various sites.

    — attributed to: KLTV 7 News (citing unnamed sources)

    • https://www.facebook.com/KLTV7News/posts/new-details-about-a-string-of-so-called-health-attacks-on-american-diplomats-in-/10159367559865416/
  3. SINGLE-SOURCECONF 0.80

    Specific global locations beyond Havana with reported AHI cases include Guangzhou, China; Austria; Colombia; Germany; India; and Russia.

    — attributed to: Grokipedia

    • https://grokipedia.com/page/Havana_syndrome
  4. VERIFIEDCONF 0.90

    U.S. embassy vehicle accidents in Colombia and Haiti have been compared to AHI incidents.

    — attributed to: JASON Report

    • https://int.nyt.com/data/documenttools/jason-report-on-havana-syndrome-cases/08bb387091859944/full.pdf
  5. CORROBORATEDCONF 0.90

    A cluster of neurological injuries was first reported by U.S. personnel stationed in Cuba in 2016.

    — attributed to: 60 Minutes

    • https://www.facebook.com/60minutes/posts/60-minutes-has-learned-details-of-a-classified-mission-that-sources-say-obtained/1280878370574210/
  6. SINGLE-SOURCECONF 0.70

    Approximately 30-40% of Havana Syndrome/AHI cases are reported from locations other than Havana.

    — attributed to: Grokipedia

    • https://grokipedia.com/page/Havana_syndrome

TIMELINE

  • 2016U.S. embassy workers in Havana, Cuba, began reporting neurological symptoms. [src]
  • 2017-09-15News reports emerge citing Havana syndrome cases appearing at multiple global locations where CIA operates and the US Embassy in China. [src]
  • 2021-11-07JASON Report on Havana Syndrome cases released, mentioning comparison of vehicle accidents in Colombia and Haiti to AHI. [src]
  • 2022-02-10Revised JASON Study on Anomalous Health Incidents released, focusing on future data collection based on a hypothesis-based definition. [src]
  • 2023Over 1,000 reports of Havana Syndrome/AHI cases recorded across sites including Guangzhou, China; Austria; Colombia; Germany; India; and Russia. [src]

ENTITIES

  • PLACE Guangzhou, China — Reported location of AHI cases
  • PLACE Austria — Reported location of AHI cases
  • PLACE Colombia — Reported location of AHI cases
  • PLACE Germany — Reported location of AHI cases
  • PLACE India — Reported location of AHI cases
  • PLACE Russia — Reported location of AHI cases
  • PLACE Havana, Cuba — Initial location of AHI reports
  • ORG U.S. government personnel — Affected individuals
  • ORG CIA — Organization whose global operating locations are associated with some AHI reports
  • ORG JASON Study — Scientific advisory group that analyzed AHI data

OPEN QUESTIONS — PENDING LEADS

  • What specific U.S. government agencies or departments have officially confirmed AHI cases in Guangzhou, China, Austria, Colombia, Germany, India, or Russia?
  • Are there any declassified government reports that provide temporal-geographic clustering data for AHI cases outside of Havana?
  • What specific symptoms were reported in AHI cases in Guangzhou, China, and how do they compare to those reported in Havana?
  • Have any peer-reviewed scientific studies confirmed environmental or biological explanations for AHI clusters in locations other than Cuba?
  • What percentage of the 1,000+ reported AHI cases by 2023 have been medically diagnosed with objective findings, and in which locations?

EVIDENCE — CAPTURED SOURCES

  1. [WEB] https://www.state.gov/wp-content/uploads/2022/02/JASON-Study-Revised_10-February-2022-Redacted_V1.1.pdf [archived]
    10 Feb 2022 · Our analysis provides a way to focus future data collection on a hypothesis-based definition of Anomalous Health Incidents that combines both ...
  2. [WEB] https://www.facebook.com/KLTV7News/posts/new-details-about-a-string-of-so-called-health-attacks-on-american-diplomats-in-/10159367559865416/
    15 Sept 2017 · Havana syndrome cases appeared at: - Multiple global locations where CIA operates - US Embassy in China (major intelligence hub) - Various ...
  3. [WEB] https://www.ncbi.nlm.nih.gov/books/NBK390426/ [archived]
    This public workshop featured invited presentations and discussions that described the emergence and global movement of vector-borne diseases.
  4. [WEB] https://grokipedia.com/page/Havana_syndrome [archived]
    over 1,000 reports by 2023 across sites including Guangzhou, China; Austria; Colombia; Germany; India; and Russia. 30-40% of Havana Syndrome/AHI cases have ...
  5. [WEB] https://int.nyt.com/data/documenttools/jason-report-on-havana-syndrome-cases/08bb387091859944/full.pdf [archived]
    7 Nov 2021 · A comparison of the reported excess of accidents involving U.S. embassy vehicles in Colombia and Haiti to AHI.
  6. [WEB] https://geneva-academy.ch/wp-content/uploads/2025/09/IHL-in-Focus-Annual-Report-23-24.pdf
    This Annual Report aims to set out key observations around the changing nature of armed conflict, patterns of violence, and potential future threats.
  7. [WEB] https://www.facebook.com/60minutes/posts/60-minutes-has-learned-details-of-a-classified-mission-that-sources-say-obtained/1280878370574210/
    8 Mar 2026 · ... US diplomats began falling sick in Havana ... cluster of neurological injuries first reported by U.S. personnel stationed in Cuba in 2016.
  8. [WEB] https://afsa.org/sites/default/files/fsj-2022-01-02-january-february.pdf [archived]
    2 Jan 2022 · The deputy mayor of Los Angeles argues that breaking down the silos between foreign and domestic policy will make international affairs more.
  9. [REDDIT] https://www.reddit.com/r/MedNewsUKDaily/ [archived]
    Here are all the latest medical news, healthcare updates, clinical trials, medical research, and other relevant healthcare information released in the past ...
  10. [REDDIT] https://www.reddit.com/r/goodinfosource/ [archived]
    13 Apr 2020 · You have the island of Cuba, also home to the. US Guantanamo Naval Base . In 2016, US Embassy workers were targeted on the island and the FBI ...
  11. [REDDIT] https://www.reddit.com/r/TruthLeaks/wiki/george-webb-series-word-frequency-analysis/ [archived]
    25 Feb 2017 · r/TruthLeaks: Open Source Investigations related to George Webb's Thesis.

CROSS-REFERENCE

Havana Syndrome: Anomalous Health Incidents Intelligence Community Assessments and Disputes — SHARES-EVENT (OUTGOING)HAVANA SYNDROME: ANOMALOU…Havana Syndrome: Foreign Weapon Capabilities Briefings — SHARES-ACTOR (INCOMING)HAVANA SYNDROME: FOREIGN …India's 'Smiling Buddha' Nuclear Test (1974) and International Reactions — SHARES-LOCATION (INCOMING)INDIA'S 'SMILING BUDDHA' …Anomalous Health Incidents (AHI) and Environmental/Psychosocial Factors — SHARES-ACTOR (INCOMING)ANOMALOUS HEALTH INCIDENT…Foreign Intelligence Services Facilitating U.S. Arms Transfers to Third Parties — SHARES-LOCATION (INCOMING)FOREIGN INTELLIGENCE SERV…Sri Lankan Civil War: Indian RAW Involvement and LTTE Foreign Support Networks (1983-2009) — SHARES-LOCATION (INCOMING)SRI LANKAN CIVIL WAR: IND…Havana Syndrome: Global Locations of Anomalous Health Incidents Beyond CubaHAVANA SYNDROME: GLOBAL LOC…THIS FILESHARES-EVENTSHARES-ACTORSHARES-LOCATION