“Everything happens at once,” Maddow wrote in a statement posted on her Twitter account Friday evening. “I have had a close contact test positive for COVD -- I've tested negative thus far but will be at home quarantining 'til it's safe for me to be back at work without putting anyone at risk. You will be in good hands tonight with Nicolle (Wallace) and Joy (Reid) and Brian (Williams) and the Great and Good Mr. (Steve) Kornacki and the whole MSNBC crew. See you soon! Wishing everyone patience and calm; may these remarkable time bring the best in all of us."