We solved the clue 'Edward Jenner used it when developing the world’s first successful vaccine' which last appeared on March 2, 2024 in a N.Y.T crossword puzzle and had six letters. The one solution we have is shown below. Similar clues are also included in case you ended up here searching only a part of the clue text.
EDWARD JENNER USED IT WHEN DEVELOPING THE WORLDS FIRST SUCCESSFUL VACCINE New York Times Clue Answer
- COWPOX