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The Pentagon revealed Monday that the White House was kept in the dark over Secretary of Defense Lloyd Austin's intensive care unit hospital treatment for days due to his chief of staff having the flu. 

Pentagon press secretary Maj. Gen. Pat Ryder provided updates to the media in an off-camera gaggle Monday, where he explained that Austin's quiet hospitalization was kept from the White House and National Security Council for days due to Austin's chief of staff having the flu. 

The press secretary added that Austin is out of the ICU and is in "good" condition, but remains at Walter Reed hospital for continuing treatment.

WHITE HOUSE RESPONDS TO GOP CALLS FOR SEC AUSTIN'S RESIGNATION AFTER MYSTERY AILMENT, HOSPITALIZATION 

Sec. Lloyd Austin

Secretary Lloyd Austin speaks during a news conference at the Australia-U.S. Ministerial Consultations in Brisbane, Australia, on July 29, 2023. (Ian Waldie/Bloomberg via Getty Images)

The Pentagon added Monday that the U.S. military strike on Thursday of an Iran-backed militia was authorized before Austin's hospitalization. 

Austin underwent an elective medical procedure on Dec. 22 at Walter Reed National Military Medical Center, and days later experienced "severe pain" while at home. He was again transported to the hospital on Jan. 1 to the intensive care unit, Ryder told Fox News on Sunday. There have been no details released clarifying what elective procedure was carried out. 

The Pentagon said the White House was not told on Dec. 22 that Austin was undergoing the elective procedure. Defense Deputy Secretary Kathleen Hicks, who picked up some of Austin’s responsibilities during the procedure last month, was also not informed as to why, meaning both the White House and the Department of Defense’s deputy were unaware of the procedure on Dec. 22 and the subsequent complications.

DEFENSE SECRETARY AUSTIN RESUMES DUTIES, WAS IN INTENSIVE CARE UNIT FOR DAYS AS PUBLIC KEPT IN THE DARK 

Ryder clarified Monday that Austin was initially taken to the hospital last week via ambulance. 

Walter Reed

The entrance of Walter Reed National Military Medical Center in Washington, D.C., Nov. 19, 2021. (Olivier Douliery/AFP via Getty Images)

Austin has resumed his duties, but remains at Walter Reed. The Pentagon said no date is set on when he will be released. 

DEFENSE SECRETARY AUSTIN HAS NO PLANS TO RESIGN, PENTAGON SAYS

The media was made aware on Friday of Austin’s hospital treatment, and reports quickly followed that President Biden, the National Security Council and top Pentagon leaders – including Hicks – were kept in the dark regarding the hospitalization for days.

President Joe Biden

President Biden speaks during a meeting of the National Infrastructure Advisory Council at the White House on Dec. 13, 2023. (Al Drago/Bloomberg via Getty Images)

Outrage has since mounted, as Republican lawmakers and leaders sound off that Austin must answer many questions regarding the communication breakdown in the chain of command, and even calling for him to resign or be fired. 

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The White House and Pentagon have both said there are no plans for Austin to resign.