Ideas like these, both ideologically freighted and scientifically disputed, have propelled the radiologist and senior fellow at Stanford University's conservative Hoover Institution into President Trump's White House, where he is pushing to reshape the administration's response to the pandemic.

Mr. Trump has embraced Dr. Atlas, as has Mark Meadows, the White House chief of staff, even as he upsets the balance of power within the White House coronavirus task force with ideas that top government doctors and scientists like Anthony S. Fauci, Deborah L. Birx and Jerome Adams, the surgeon general, find misguided — even dangerous — according to people familiar with the task force's deliberations.

That might be the point.

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