This is the 10614th most frequent Korean word.
국제연구진은
"International research team."
In this sentence, "국제연구진은" is used as the subject indicating the entity that conducted the discovery.
국제연구진은 새로운 종의 발견을 발표했습니다.
The international research team announced the discovery of a new species.
Here, "국제연구진은" acts as the subject working on the ongoing research.
국제연구진은 이 문제에 대해 다양한 실험을 진행하고 있습니다.
The international research team is conducting various experiments on this issue.
In this context, "국제연구진은" refers to the team that achieved the vaccine development.