United States President Donald Trump along with first lady Melania Trump have tested positive for COVID-19, according to a tweet posted by the president late Thursday evening.

The confirmation of Trump’s positive test comes just hours after the White House announced that senior aide Hope Hicks had contracted the virus; Hicks had been traveling with the president several times this week.

Hicks’ travel with Trump including aboard Marine One, the presidential helicopter, and on Air Force One to a rally in Minnesota Wednesday, and aboard Air Force One to Tuesday night’s first presidential debate in Cleveland.

After Hicks came down with the virus, Trump also announced on Twitter that he and first lady Melania Trump were beginning a “quarantine process” while they awaited their test results; although it wasn’t clear what that might entail at the time.

COVID-19 has that has now killed more than 200,000 people in the US, and positive case numbers continue to mount each day.