Stephanie M. Lee has a very detailed article for Buzzfeed News “A Data Sleuth Challenged A Powerful COVID Scientist. Then He Came After Her”, link.
The story focuses on the career of Elisabeth Bik. Early in the pandemic, she started to question the claims of French scientist Didier Raoult, that hydroxychloroquine could treat Covid, which encouraged Trump to remain rosy about the pandemic during the lockdowns that started in March 2020.
Mochael Donnelly, who broke the story on the Provincetown Breakthrough cases in July 2021, is another good example.