TIL In 2019 a man in the United States had a bone marrow transplant for leukemia and four years later his semen was the same as the donor. So, if he had children, they wouldn't have his DNA....he is now considered a chimera.

https://search.app?link=https%3A%2F%2Fwww.news-medical.net%2Fnews%2F20191210%2FTransplant-patient-finds-out-his-DNA-has-been-replaced-by-that-of-h…
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gnqq1f/til_in_2019_a_man_in_the_united_states_had_a_bone/