The Last of Us' has been terrifying viewers - but the truly horrifying reality is that the show's deadly zombie fungi does actually exist.
Based on the much-loved video game of the same name, the HBO series transports us to a world where a parasitic fungi has turned most of the world's population into mushroom-headed zombies.
Game of Thrones stars Pedro Pascal and Bella Ramsey play Joel and Ellie, who are trying to avoid being infected as society collapses around them.
