ATLANTA (AP) — More bystanders are willing to attempt CPR if an emergency dispatcher gives them firm and direct instructions — especially if they can just press on the chest and skip the mouth-to-mouth, according to new research.

The two new studies conclude that “hands-only” chest compression is enough to save a life. They are the largest and most rigorous yet to suggest that breathing into a victim’s mouth isn’t needed in most cases.

The American Heart Association has been promoting hands-only CPR for two years, though it’s not clear how much it’s caught on. The new studies should encourage dispatchers and bystanders to be more aggressive about using the simpler technique

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