(CNN) While the patient was being treated in isolation for Covid-19, his caregivers at the Cleveland Clinic left him messages on his room's glass door.

After his recent discharge from the intensive care unit, he did the same for them, leaving a heartfelt note that the center posted Wednesday on Instagram . His sentiments reflect the widespread sense of gratitude to health care workers on the front lines of the coronavirus pandemic.

Here's what he wrote to the hospital staff:

"This window has been the most impactful window in my life.

"On days when I watched you work hard to keep me and others alive, unable to thank you for the time that you poured into me -- and although I will probably never get the chance to pour that same love and support into you, I want you to know that I think you all are rockstars.

Read More