Researchers use special new methods to check for animal viruses; experiments come after historic but ultimately failed attempt to use a pig's heart to save a dying man

Team behind operation say they're still hopeful David Bennett's case will one day help advance cross-species organ donations

US study shows no sign of rejection by donated body of brain-dead man, with experts saying string of breakthroughs are promising -- but many hurdles remain

Despite COVID-19 pandemic, there were 647 donations carried out last year, including a 30% increase in 'altruistic' donors who were not acquainted with the recipient

Doctors at Baltimore hospital say 57-year-old, who did not qualify for human heart, doing well 3 days after operation to implant organ genetically modified against rejection