Gavi, the Vaccine Alliance(@gavi):For around 2,000 years, Western medicine explained illness through the balance of four bodily “humours”: Blood, phlegm, yellow bile and black bile. The theory was wrong. But ancient Greek physician Hippocrates and his followers still helped lay foundations for scientific medicine that endure today:

Gavi, the Vaccine Alliance

@gavi

Gavi, the Vaccine Alliance, helps vaccinate half the world’s children against deadly and debilitating diseases. French posts @gavi_fr #ForOurFuture#

Joined December 2009

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Gavi, the Vaccine Alliance@gavi

2026.08.20 06:00

For around 2,000 years, Western medicine explained illness through the balance of four bodily “humours”: Blood, phlegm, yellow bile and black bile. The theory was wrong. But ancient Greek physician Hippocrates and his followers still helped lay foundations for scientific medicine that endure today: