"heard" [herd] immunity is just another way of admitting that vaccines are only maginally effective. If they're effective, you're protected. If not, then you can run around doing mental gymnastics blaming it on everyone else. Measles outbreaks routinely happen in 99% vaccinated populations.

Sodium Fluoride and fluorosilicates have been used as pesticide for over 100 years. But I'm sure it's just in the water for your teeth.... Kind of like you drink sunscreen to protect your skin from the sun.