More than 100,000 people are on a waiting list for an organ. One kidney patient said he owes his life to a complete stranger. They met for the first time Thursday.Andy McEachron is a high school teacher in St. Joseph, Missouri. Harold Tignor is a 20-year military veteran. The two might never have met were it not for a Facebook post, explaining how McEachron was in desperate need of a new kidney."I was really feeling the effects of my polycystic kidney disease. So just, you know, back pain, fatigue, just a lot of blood pressure issues. It was hard to manage," McEachron said.Tignor saw the post and signed up to get tested. He was a perfect match. Surgeons at Saint Luke's Hospital in Kansas City performed the transplant last summer.On Thursday, McEachron and Tignor met for the first time. Because of COVID-19, it was a virtual introduction."You look like you're doing really good, healthy and everything," Tignor said."I feel good thanks to you, yeah. Hanging in there," McEachron said.Dr. Lee Cummings is part of Saint Luke's transplant team and admires altruistic organ donors like Tignor."You really look up to those people who are willing to join in that way, put their life at risk, essentially, to help somebody else that they don't know," Cummings said."It's a no-brainer. Go do it. It feels, I felt great. I feel great now seeing him finally, how good he's doing and stuff," Tignor said."Sometimes still I have trouble thinking about it, you know? It's like, 'Wow, I can't believe he did this, this incredible thing,'" McEachron said. Both men say this has changed their lives."Just the feeling. It hits me right now as it is, just the feeling," Tignor said. "Even my alarm clock on my phone is labeled, you know, be thankful for another day. I mean it's been like that ever since, ever since my surgery, ever since Harold helped me out," McEachron said.