But learning how to rest properly is important, and not just when it comes to COVID recovery; rest is a recommended treatment for nearly everything that wears your body down, from the common cold to burnout. It’s recently become a key form of self-care for me personally: After testing positive for mononucleosis in early September and dealing with months of persistent and ongoing fatigue, brain fog, and muscle aches, I’ve become even more aware of the ways in which rest is both extremely necessary and incredibly difficult.