Even Mild Cases of COVID Can Leave Lingering Insomnia / Uncategorized / By Wendy Votroubek nsomnia is a problem in many individuals; a recent study finds that approximately 76% of individuals with mild COVID have experienced Insomnia and 23% with severe insomnia. https://www.healthday.com/health-news/sleep-disorder/even-mild-cases-of-covid-can-leave-lingering-insomnia