Historical Plague Treatments: Medieval Remedies & Their Basis

During the Black Death (1347–1351) and subsequent outbreaks, treatments reflected humoral theory, superstition, and desperation:

Common Approaches

• Bloodletting (Phlebotomy): Remove "corrupt humors"; often weakened patients further.
• Herbal Remedies: Garlic, onions, rue, theriac (complex opiate-antidote compound); some antimicrobial properties but insufficient.
• Magical/Ritualistic: Amulets, spells, burning herbs, flagellation – no biologic effect.
• Prayer & Religious Processions: Spiritual solace; gatherings may have increased spread.
• Quarantine (Quaranta Giorni): 40-day ship isolation (Venice, 1377); first public health measure with rational basis.
• Purging/Emetics: Expel "poison"; dangerous dehydration.
• Dietary: Avoid "corrupt" foods; vinegar consumption.

Why They Failed

• No understanding of germ theory (Yersinia pestis discovered 1894).
• Focus on humoral balance, not contagion.
• Sanitation absent; rats/fleas uncontrolled.

Quarantine was the only intervention with lasting public health legacy. Modern plague is treatable with antibiotics (streptomycin, doxycycline) if caught early.