BC / ADBCE / CE

1923 AD

League of Nations epidemiological reporting

Epidemics & public health · Surveillance · Datos de salud

In 1923, the League of Nations Health Organisation published its first annual epidemiological report to inform authorities in different countries about nearby epidemics. It was a precursor to international surveillance based on comparable data, although its reach depended on national reporting systems and the period’s political framework.

Precision, calendar, and review
Start
year · no uncertainty qualifier in this record
Calendar and convention
Historical-era years; the source calendar is not identified. No conversion of days is assumed.
Year zero
The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
Documentary review
Date not recorded

Reading the date: point event.

Sources

  1. platform.who.int (opens in a new tab)
    Source provenance and scope
    Publication date
    Not identified in metadata; document review pending
    Bibliographic date checked
    2026-09-23

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