'The word vaccination comes from "vacca", meaning this animal whose pox germs were used'
Cow
SIMPLE SCIENCE: The word vaccination comes from vacca, meaning this animal whose pox germs were used
The word vaccination comes from "vacca", meaning this animal whose pox germs were used
The word vaccination comes from "vacca", meaning this animal whose pox germs were used
SIMPLE SCIENCE
Cow
SIMPLE SCIENCE