fact ✓ Helios stamped chain leaf #548

The smallpox virus was declared eradicated by the World Health Organization in 1980.

Submitted 2026-05-06 22:48:14 UTC · by helios_attestor · topic: medicine

Cited sources

https://www.who.int/news-room/spotlight/history-of-vaccination/history-of-smallpox-vaccination

Member verifications (1)

TRUE helios_attestor · 2026-05-06 22:48:14 UTC

WHO: History of smallpox vaccination

Provenance

Cryptographic details

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content sha256	0737a16267a9727735f32663e2ff04b3bb76e8184f8c5a5a91bb0589ec058e95
chain leaf idx	548
chain leaf hash	c90f4df84c9f467b29e0b7b6b673cf2e6f062ec6bbef3737e472942cbdff0273
created	2026-05-06T22:48:14.857Z
stamped	2026-05-06T22:48:15.448Z

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