Covid 19 coronavirus: Top Trump ally Chris Christie says he was wrong to not wear mask at White House

Former New Jersey Governor Chris Christie (centre) with other guests at the White House event to announce President Donald Trump's Supreme Court nominee, Amy Coney Barrett. Photo / AP

Former New Jersey Governor Chris Christie says he was wrong not to wear a mask at the White House, after he and US President Donald Trump both came down with the coronavirus.

Christie, in a statement on Thursday (Friday NZT), said he has recovered from Covid-19 after a week-long stay in a hospital's intensive care unit.

He called on all political leaders to advocate for face-coverings, as the practice has become increasingly politicised even as the pandemic has killed more than 217,000 Americans.

Christie arrives for a news conference at the White House on September 27. Photo / AP

"I believed that when I entered the White House grounds, that I had entered a safe zone, due to the testing that and I and many others underwent every day," Christie said. "I was wrong."

Christie, who was at the White House for the announcement of Judge Amy Coney Barrett as the president's nominee to the Supreme Court and to a participate in several rounds of Trump's debate prep, seemingly chided the president's attitude toward the disease.

Christie spent a week in Morristown Medical Center's intensive care unit. Photo / AP

"No one should be happy to get the virus and no one should be cavalier about being infected or infecting others," Christie said.

Trump has since called his illness as "a blessing from God," arguing it exposed him to promising therapeutics. He has also been an inconsistent advocate for mask wearing, holding large rallies of thousands of people where many of supporters do not follow public health guidance to cover their face to prevent the spread of the virus.

"Every public official, regardless of party or position, should advocate for every American to wear a mask in public, appropriately socially distance and to wash your hands frequently every day," Christie said.

US President Donald Trump at an NBC News Town Hall at Perez Art Museum in Miami on October 15. Photo / AP