The revelation of former President Joe Biden ‘s cancer diagnosis has seemed to halt the ongoing debate over his fitness for office. But the co-author of the new book “ Original Sin ” tells Variety that conversation is fair, and should continue.

President Joe Biden's "aggressive" prostate cancer has led to renewed interest in his health during his presidency

Questions about Joe Biden’s cancer diagnosis have been among the most searched on the internet since he announced his illness Sunday morning. How could the disease have gone undetected in the former commander in chief,