Antivaxers amuse me. They don't know the difference between metal and salts (or, in the case of mercury- containing thimerosal), an organometallic compound) and think that a video like this has something to say about mercury and aluminum in vaccines. Chemists laugh! 
https://twitter.com/Jenniferhoffman/status/1034305170971262977 …
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I may or may not know something about putting metallic sodium in empty cough capsules, and then leaving them in the toilet bowl..
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