I haven’t heard of this before, so maybe you haven’t either, so here ya go. The FATAL poison is Sodium Azide.  And confirmed by the FDA  HERE.   The video below is only 2 minutes long (not three). They have a thousand ways to kill us, don’t they?

https://www.theburningplatform.com/2021/12/22/covid-home-test-kits-contain-a-deadly-poison/