WATCH: Ousted Scientist Says 'Window Of Opportunity' To Fight Coronavirus Is Closing

Updated at 9:37 a.m. ET

Richard Bright, a career government scientist-turned-whistleblower, will tell a congressional panel Thursday that without a stronger federal response, the coronavirus threatens to make 2020 the "darkest winter in modern history."

Bright is testifying before the House Energy and Commerce Subcommittee on Health, which called the hearing after Bright filed a whistleblower complaint with the Office of Special Counsel.

The House hearing is set to begin at 10 a.m. ET. Watch live here.

Bright contends that he was removed from his post as director of the Biomedical Advanced Research and Development Authority by top officials at the Department of Health and Human Services "in response to my insistence that the government invest funding allocated to BARDA by Congress to address the COVID-19 pandemic into safe and scientifically vetted solutions, and not in drugs, vaccines and other technologies that lack scientific merit," according to his prepared testimony, released Tuesday by the subcommittee.

Bright says his testimony is to be "forward looking" and that he is speaking out "because science — not politics or cronyism — must lead the way to combat this deadly virus."

Bright contends that his transfer to a lower-ranking post at HHS came because of his reluctance to promote use of the anti-malarial drug hydroxychloroquine to treat patients with COVID-19, which had been touted by President Trump and others.

Trump has dismissed Bright as "a disgruntled employee who's trying to help the Democrats win an election."

In his written opening statement, Bright paints a gloomy picture unless the Trump administration responds more quickly and more strongly to the coronavirus.

"It is painfully clear that we were not as prepared as we should have been," Bright says. "We missed early warning signals and we forgot important pages from our pandemic playbook."

Bright warns, "Our window of opportunity is closing. If we fail to develop a national coordinated response, based in science, I fear the pandemic will get far worse and be prolonged, causing unprecedented illness and fatalities."

"The undeniable fact is there will be a resurgence of the COVID-19 this fall, greatly compounding the challenges of seasonal influenza and putting an unprecedented strain on our health care system," he says. "Without clear planning and implementation of the steps that I and other experts have outlined, 2020 will be the darkest winter in modern history."

Bright's attorneys say the Office of Special Counsel has determined there were "reasonable grounds" to believe that his removal from his post at BARDA was retaliatory and therefore prohibited.

The OSC says it can't comment on an open case.

Also scheduled to testify at the hearing is Michael Bowen, vice president of Prestige Ameritech of North Richland Hills, Texas, which produces surgical masks. According to his testimony, Bowen sent emails to Bright and other officials at HHS over a 13-year period, warning of a shortage of masks in the U.S.

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