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VIA USA Today:
CINCINNATI — Be aware: That COVID-19 test kit in your home could contain a toxic substance that may be harmful to your children and you.
The substance is sodium azide, and Cincinnati Children's Hospital Medical Center's Drug and Poison Information Center has seen a surge in calls about exposures to the chemical since more people started self-testing for COVID-19 at home.
Fifty million U.S. households have received some version of the test kits, although it's not clear how many contain sodium azide. The government has sent 200 million of the kits, with about 85% of initial orders filled, officials said at a White House briefing last week.