In a copy of "Original Sin, President Biden's Decline, Its Cover-Up, and His Disastrous Choice to Run Again" obtained by ABC News, authors and journalists Jake Tapper and Alex Thompson allege that former President Joe Biden hid information about the cancer diagnosis of his late son,

Former President Joe Biden is being treated for prostate cancer, one of the most common cancers among men. Biden’s cancer is an aggressive form of the disease, and has spread to his bones, according to a statement released Sunday by his office.

On May 18, former President Joe Biden’s staff announced he has an aggressive form of prostate cancer. In response, several social media users began circulating a three-year-old video clip of Biden as evidence that he knew about his diagnosis years before.