That is a good question! I live in a gentrified area and 1 block over is a homeless shelter & 2 blocks over is where they sleep by the river park. I see them always walking my dog and became a little friendly with them, give em food and blankets sometimes, sweatshirts. Most don't have to be homeless & its true they want to. They are always ending up in the hospital or jail ( alcohol, fights, getting beat up, etc..) then they come back. BUT NONE EVER GET COVID! I ASK because I know they get tested all the time. They never get sick period! I always tell my son its because they live outside in dirt & sleep under trees & stars
Maybe I am right