” Mad as a hatter ” is a colloquial English phrase used in conversation to suggest that a person is suffering from insanity. It is believed to emanate from Denton, Greater Manchester, where men in the area worked predominantly in the hattery business, which used mercury in the hat making process.”

Is there still mercury in any vaccine?
I believe so. There definitely was in the many vaccines that rendered my young son “autistic” (heavy metal poisoning), but that was back in the late 1990s and early 2000s. He’s okay now and doing fine, but not without a lot of heartache and effort by him, my wife, and me. If you get a vaccine, I suggest asking whoever is administering it about mercury as well as aluminum adjuvants (which also results in heavy metal poisoning). If they don’t know, assume the vaccine contains both.
Thank you for your advice.We just discussed this in the comments few days ago
https://envirowatchrangitikei.wordpress.com/2021/03/20/fauci-claims-babies-toddlers-need-to-be-vaccinated-for-herd-immunity-touts-2022-as-viable-timeline/