Felicity Cloake: New research says that people who eat processed meat have an increased risk of an early death. Does this mean we have to give up sausages – or will we be OK if we buy posh bangers and grill rather than fry them?
Mal Peet: From John Green's The Fault in our Stars to Jenny Downham's Before I Die, childhood cancer is becoming a taboo-busting subject for teen fiction