Laws to protect athletes’ brains do reduce concussions — eventually
![girls playing soccer](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/10/101917_AC_concussions_main_FREE.jpg?fit=860%2C460&ssl=1)
HARD KNOCKS Girls had almost twice the annual rate of concussions as boys when researchers compared sports — soccer, basketball and baseball/softball — that both played.
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