Definition

1. Noun:
   • The obsolete process of inoculating a susceptible person with material taken from a vesicle of a person who has smallpox: Variolation was a historical method of immunization against smallpox. It involved deliberately infecting a healthy individual with material (e.g., pus or scabs) from a smallpox blister of a person with a mild case of the disease, with the goal of inducing a milder, controlled infection that would provide future immunity.

Usage Examples

• Noun:
  • Variolation was practiced for centuries before the development of the modern smallpox vaccine.
  • The risks of variolation included the potential to cause a severe, even fatal, case of smallpox.

Advanced Usage

• Historical Context: The term "variolation" is almost exclusively used in historical and medical history contexts to describe this precursor to vaccination. It is considered an obsolete practice.
  • The adoption of variolation in 18th-century Europe was a controversial but significant step in disease prevention.

Variants and Related Words

• Variolate (verb, obsolete): To inoculate with the smallpox virus via variolation.
  • Physicians would variolate patients to try to induce immunity.
• Variolous (adjective): Relating to or affected with smallpox.
  • Variolous material was used in the procedure.

Synonyms

• Inoculation: (In a historical context) The introduction of a pathogen or antigen into a living organism to stimulate immunity. "Variolation" is a specific type of smallpox inoculation.
• Engraftment: (Archaic) A historical term sometimes used synonymously with variolation.

Related Phrases/Idioms

(This term is highly technical and historical; it is not commonly used in idioms or phrasal verbs.)

Noun

1. the obsolete process of inoculating a susceptible person with material taken from a vesicle of a person who has smallpox