1918 CE–1919 CE
1918–1919 influenza pandemic
Epidemics & public health · Influenza · Pandemias · Medidas no farmacológicas
The 1918–1919 influenza pandemic spread worldwide during the war and produced exceptional mortality. There is no universal consensus on the virus’s geographic origin, and impact estimates vary by source; without vaccines or antibiotics for secondary bacterial infections, available measures—isolations, quarantines, and limits on gatherings—were applied unevenly.
Precision, calendar, and review
- Start
- year · no uncertainty qualifier in this record
- End
- 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: duration of a process.
Sources
- archive.cdc.gov (opens in a new tab)
Source provenance and scope
- Publication date
- Not identified in metadata; document review pending
- Bibliographic date checked
- 2026-09-23
The correspondence between this reference and individual claims has not yet been itemized.
This record is an editorial synthesis. Consult the sources to check claims and their limits. Chronological relationships alone do not establish causation.