Practitioner Kenneth Remy, from Missouri, US, shared a harrowing video of himself leaning over a hospital bed, with the camera placed where a patient would be lying.
Staring down with a mask, goggles and full PPE on, Dr Remy said that this is what people should expect to see before they die if they don't wear a mask and practice social distancing.
"I hope that the last moment of your life doesn't look like this," said the doctor, who is a researcher at Washington University in St. Louis and a physician at Barnes-Jewish Hospital and St. Louis Children's Hospital.
You can watch the chilling video below:
Moving back and forth to simulate the appearance of the patient quickly breathing, the doctor said that in the moments before their death, a Covid-19 patient would breathe as much as 40 times a minute, while their oxygen levels would drop below 80.
"This is what you'll see at the end of your life if we don't start wearing masks when we're out in public," Remy said.
"When we don't practice social distancing. When we don't wash our hands frequently. Because I promise you, this will be what you see".
His voice shaking, he went on: "I promise you, this is what your mother, or your father or your children - when they get Covid disease - will see at the end of their life".
The doctor went on to beg people to follow guidelines in place to protect them from the spread of Covid-19.
"This is serious. I beg you. Please practice the precautions to reduce transmission of the Covid disease so we can effectively prevent disease for you and your loved ones."
Speaking about what prompted him to make the video to CBS News' Jonathan Vigliotti, Dr Remy said he'd witnessed over 10 Covid deaths in one evening, and it pushed him to speak out.
"I've actually called about 11 different families to let them know in the middle of the night that their loved one had unfortunately succumbed to COVID disease," Remy said.
"It's one of the worst phone calls you could ever make. This is something I don't want for anyone."