更多cowpox例句

1. Public vaccination began after English physician Edward Jenner learned that milkmaids were protected from smallpox after exposure to cowpox, a related virus in cows.
2. In 1798, the English physician Edward Jenner had shown that an injection of cowpox — variolae vaccinae — protected people from the horrors of smallpox.
3. Another function of the board of health is the preparation and distribution of vaccine (material containing the virus of cowpox).
4. Whether cowpox is a modified form of smallpox or a distinct disease is unknown.
5. After he had differentiated genuine cowpox, however, there was no difficulty in tracing its apparent protective power.
6. The boy went through an attack of cowpox in a regularly satisfactory manner.
7. Jenner demonstrated conclusively that the cowpox protects the human constitution from the infection of smallpox.