"I regularly test for COVID & while I tested negative earlier this week, today I tested positive with a breakthrough case," Warren said in a tweet. She added that she is only experiencing mild symptoms and is "grateful for the protection provided against a serious illness that comes from being vaccinated & boosted."

So....we are staying home with immediate family members and a friend who is vaccinated and boosted. With two kids under five, we cannot in good conscience go to a larger gathering. There will be other years.