Three years ago, Dr Deepika Chopra was just months into writing a book about optimism when she found herself confronting a crisis that threatened to dismantle everything she thought she understood about hope.
Her son was two-and-a-half years old when, as she recalls it, their lives changed “out of nowhere”.
“One moment he was playing with his brother, and the next moment we were in the hospital dealing with a rare, serious medical issue,” says t…