- pox lesions on the udder of cows(์์ ์ ๊ผญ์ง)
- cowpox, vaccinia ๋ณ๋ณ๊ณผ ๊ตฌ๋ณ ์ด๋ ค์
- Etiology : pseudocowpox virus
- Transmission : udder of milking cows์ pox lesions๋ฅผ ํตํด milkers์๊ฒ ๊ฐ์ผ
- Vaccination : vaccinia virus vaccine does not induce protection