I posted this story in another thread here.
When I was 12 and I went to camp with my scout group to the mountains, I remember we had to walk a lot, while walking we saw many crosses next to the river and I asked why were those crosses there and the guys that took us there told us there was where people buried their relatives with tuberculosis. Then when we got to the place where we were camping, we lighted a bonfire and at the next day we saw little footprints on the ashes. The size of the footprints were too small to be one of us and they were shoes footprints so it couldn't be a dog either. This happened nearly 10 years ago and only last year I realized there is an abandoned hospital near that place and this hospital once treated kids with tuberculosis.