A former clinical trial overseer for a contractor holding trials of Pfizer’s COVID-19 vaccine is pressing forward with a lawsuit against Pfizer and her former company despite the U.S. government declining to side with her. Brook Jackson was fired by the contractor, Ventavia Research Group, in 2020. She came forward as a whistleblower in 2021. Jackson filed a False Claims Act suit against Pfizer, Ventavia, and another company involved in the trial, ICON. It has been under seal for over a year, but is now public after the U.S. Department of Justice declined to intervene on behalf of Jackson. Government lawyers did not explain the choice not to intervene and the Food and Drug Administration (FDA), which investigates alleged clinical trial fraud, did not respond to a request for comment. The choice, though, has not deterred the whistleblower. “We’re going to pursue the case without the help of the government,” …