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On Monday, he updated fans about his condition. "The last few days were rougher than I expected," Underwood wrote. "The most prominent symptoms are my cough, night sweats and shortness of breathe. Breathing is challenging, the best way to describe it is feeling like I only have access to 20% of my lungs."
The former NFL player revealed he's been writing in a journal throughout this whole experience and will share those soon. As for his medicine, he said he's currently taking hydroxychloroquine, Z-Pak, and an inhaler.
"I’m hopeful that they are starting to work! This morning was the first time that I’ve felt any real type of improvement since the beginning of this," Underwood continued. "I'm hopeful that I’ve turned the corner and will be back to 100% soon. We are very lucky that all of this was manageable at home after getting the proper medicine."
Underwood has no idea how he contracted the virus but is extremely thankful to able to recover with his girlfriend Cassie Randolph at her parents' house in Huntington Beach, Calif.
Underwood said he's been isolated on the third floor of the house and Cassie, 24, brings him food and medicine after which, Cassie sanitizes herself down.
"I’m on the third story of the Randolph’s home, isolated from the rest of the family (The Health Department called and spoke to both Cassie’s mom and me to make sure we understood timing and what to do)," Underwood explained. "When they make food they make an extra plate and drop it off and have been checking on me regularly to make sure I am comfortable and breathing! They have been amazing and have been taking great care of me."
“We’re here with my family," Cassie said on social media. "We’ve been doing the social distancing and been quarantining ourselves for the past week now. Now we all can’t leave the house."