Former top U.S. vaccine official Rick Bright on May 14 testified that the United States still lacked a coordinated plan to combat the coronavirus pandemic. (Video: Reuters)

A former top U.S. vaccine official and an executive of a medical mask maker in Texas each told Congress on Thursday they believe lives were lost because of missteps by the Trump administration in its early handling of the coronavirus pandemic.

Rick Bright, who filed a whistleblower complaint after he was removed from a senior post at the Department of Health and Human Services last month, said his superiors dismissed urgent warnings in January and early February about an impending shortage of N95 respirator masks. Bright also said the administration delayed potential work on a U.S.-made vaccine by not acting fast enough or forcefully enough to press China for samples of the virus. And Bright said his removal showcased how, generally, politics overtook science as President Trump took center stage in responding to the U.S. crisis.