“Kill switches” shut down engineered bacteria. To prevent genetically modified bacteria from escaping into the wider environment, researchers have developed safeguards in the form of two so-called “kill switches,” which they call “Deadman” and “Passcode.”

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“Kill switches” shut down engineered bacteria. To prevent genetically modified bacteria from escaping into the wider environment, researchers have developed safeguards in the form of two so-called “kill switches,” which they call “Deadman” and “Passcode.”