When was the World Health Organization officially established?
NoParrot Fact Check · September 6, 2026
Fact-checked by NoParrot's 4-model methodology · Last verified September 6, 2026
NoParrot Score
Mixed signals
Claim breakdown
- Verified
- 0
- Uncertain
- 1
- Disputed
- 0
Synthesis
The World Health Organization (WHO) was officially established on April 7, 1948. This date is commemorated annually as World Health Day. The WHO's constitution came into force on this date, following its adoption and signing at the International Health Conference in New York in 1946. The establishment of the WHO on April 7, 1948, was contingent upon the ratification of its constitution by 26 member states. While the constitution's adoption and signing occurred on July 22, 1946, its entry into force on April 7, 1948, marked the official establishment of the organization.
What each model said
- Claude
The World Health Organization (WHO) was officially established on **April 7, 1948**, when its constitution came into force. This date is now commemorated annually as World Health Day.
- Grok
The World Health Organization (WHO) was officially established on April 7, 1948, when its constitution entered into force after ratification by 26 member states. The constitution had been adopted and signed the previous year on July 22, 1946, at the International Health Conference in New York.
- Gemini
The World Health Organization (WHO) was officially established on **April 7, 1948**.
- GPT
The World Health Organization (WHO) was officially established on **April 7, 1948**.
Models Used
- Claude
- Grok
- Gemini
- GPT
Disclaimer: This page summarizes the output of 4 frontier large-language models at a single point in time. NoParrot Score reflects cross-model consensus, not absolute truth. Models can be wrong, and consensus can be wrong with them. Treat this page as a research aid, not a final verdict.
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