Conway is the latest in a cascade of people linked to the White House who have contracted COVID-19.
“My symptoms are mild (light cough) and I’m feeling fine,” she tweeted. “I have begun a quarantine process in consultation with physicians.”
She added: “As always, my heart is with everyone affected by this global pandemic.”
Conway is at least the seventh person to test positive who attended a White House event last Saturday announcing the nomination of Amy Coney Barrett for the Supreme Court. Barrett had had COVID-19 earlier this year.
Donald Trump and first lady Melania Trump; Sens. Mike Lee (R-Utah) and Thom Tillis (R-N.C.), who are both on the Senate Judiciary Committee; and the president of the University of Notre Dame attended the event and have since tested positive for the virus.
A journalist covering the event has also tested positive, according to the White House Correspondents’ Association. The journalist has not been named.
Few of the dozens of people who attended the Rose Garden celebration wore masks, and many shook hands.
Dr. Eric Feigl-Ding, an epidemiologist and a senior fellow at the Federation of American Scientists, deemed it “inevitable” that more people will test positive for COVID-19 because of their links to the Barrett event.
Conway left the White House at the end of August, saying she needed time to focus on her family.