White House press secretary Jen Psaki said she tested positive for COVID-19 Tuesday, missing her press conference and side-lining her for President Joe Biden’s upcoming travel plans.

Psaki said the positive test will again force her to miss a trip to Europe, this time to a series of emergency meetings with world leaders regarding the ongoing Russian invasion of Ukraine. Biden is scheduled to depart for Belgium and Poland Wednesday morning.

“Today, in preparation for travel to Europe, I took a PCR test this morning. That test came back positive, which means I will be adhering to CDC guidance and no longer be traveling on the President’s trip to Europe,” Psaki said in a written statement.