The British government banned variolation – the use of smallpox to induce immunity – and provided vaccination using cowpox free of charge (see Vaccination Act)
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The British government banned variolation – the use of smallpox to induce immunity – and provided vaccination using cowpox free of charge (see Vaccination Act)
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-16 from Wikipedia. The archived copy is preserved so this citation survives link rot.