We had similar drama with masks distributed in Belgium. They contain nanoparticles of silver. The government gave an official recommendation to stop wearing them.
Original report: https://www.brusselstimes.com/news/belgium-all-news/156628/c...
Follow-up recommendation: https://www.brusselstimes.com/news/belgium-all-news/156876/b...
I'm still wearing mine because I don't go out often enough for it to matter (and when I do, I'm usually on a bicycle where it's not required to wear one). But what a fucked up story. I really thought this would be the end of it: anti-maskers "won", are set for life with an argument on a silver platter now. With actual silver.
Surprisingly, though, that didn't happen. People have been pretty chill about it.