Former New Jersey Governor Chris Christie is asking Americans to wear masks and to practice social distancing, after he revealed on Thursday that he spent a week in an intensive care unit while hospitalized with COVID-19. Christie is one of dozens of people — including President Trump — who became infected after a White House celebration for Trump’s Supreme Court nominee in late September.

In a statement, Christie wrote, “I was wrong not to wear a mask at the Amy Coney Barrett announcement and I was wrong not to wear a mask at my multiple debate prep sessions with the president and the rest of the team. I hope that my experience shows my fellow citizens that you should follow C.D.C. guidelines in public no matter where you are and wear a mask to protect yourself and others.”