KSL TV SALT LAKE CITY — While all adults will be eligible for a COVID-19 vaccine in just a few weeks, experts say there is a reason those with underlying health conditions are given priority. One Utah kidney transplant shares why he is so grateful he was able to get the shot. Greg Boss of Holladay is considered high risk. He's been married to his sweetheart for 25 years. Just after they returned from their honeymoon, Boss started to feel ill. He says his life changed in 2001 when he underwent a kidney transplant at just 34 years old. "April 12. I can remember the day. It snowed," he said. "My wife's little brother donated one of his kidneys to me and we celebrate 20 years, next month."