Jeremih tells TMZ, "First and foremost, I would like to thank God and the incredible team of doctors and nurses at Northwestern Memorial Hospital for saving my life. I will be forever grateful."

The R&B singer goes on ... "I would also like to thank my family and friends for all their prayers and well wishes. I'm overwhelmed with gratitude. A special thanks to Chance The Rapper, 50 Cent and Diddy for their love and support."

Those prayers from other artists and friends may have been just what the doctor ordered. As we reported, there was a time last month when it looked like Jeremih wouldn't make it. He was on a ventilator in ICU last weekend, when 50, Chance and others asked for prayers on Jeremih's behalf.

50 made it clear a week ago, things were not looking good ... "Pray for my boy Jeremih. He's not doing good. This  COVID s*** is real."

Jeremih says, "I would like to thank all my fans and people around the world who prayed for me. I'm getting stronger everyday, and look forward to spending time with my sons."