Sen. Cory Booker announced on social media that he tested positive for COVID-19 on Sunday evening.

He said that he first experienced symptoms on Saturday, which he described as relatively mild.

The senator had received to doses of the COVID-19 and a booster.

Earlier in the day, fellow Democratic Sen. Elizabeth Warren also confirmed that she was positive for the virus and experiencing mild symptoms.

“Thankfully, I am only experiencing mild symptoms & am grateful for the protection provided against serious illness that comes from being vaccinated & boosted,” she wrote, using the occasion to also urge anyone not vaccinated to do so.