why did they kill bobby on 911

Bobby Nash was killed off in the TV show "9-1-1" during a biolab explosion incident where he was trapped and infected with a lethal virus. He chose to stay behind to save his team, using the only available antiviral on a teammate instead of himself. His protective suit was compromised, and knowing his fate, he made the sacrifice to ensure the survival of others. This death was a creative decision by the show's producers to raise the stakes and remind viewers that no character is safe. It was not requested by the actor Peter Krause, who played Bobby, but was intended to bring narrative weight and authenticity to the series' storyline.