Covid-19 is a particularly vicious disease. While a significant number of people remain asymptomatic, other patients could go on to develop what researchers are calling post-Covid-19 syndrome. Americans suffering from the condition are running into financial problems due to the inconsistent nature of the U.S. health-care system. CNBC spoke with three people about their experience battling Covid and paying for their treatment. Watch the video above to learn how coronavirus treatment costs add up long after patients leave the hospital.