variola vaccina

Từ điển Oxford Learners Wordfinder Dictionary

noun

a local infection induced in humans by inoculation with the virus causing cowpox in order to confer resistance to smallpox;
normally lasts three weeks and leaves a pitted scar
• Syn:
vaccinia, vaccina, variola vaccine, variola vaccinia
• Hypernyms:
infection
• Hyponyms:
progressive vaccinia, vaccinia gangrenosa