/sci/ - Science & Math

>>15572362
Two problems with that.
1. The hysteria and increase of cases of "lockjaw" or "tetanus" coincided with the usage and wide distribution of lead, arsenic and mercury based pesticides in the 1800s-1940s.
And sharply increased in the 1890-1910.
And the tetanus vaccine was only widespread in use after WWII to be exact the tetanus vaccine was only available in 1990s to the normal population, before that only Soildiers took it.
But the tetanus cases decreased long before the widespread use, which coincided with the decrease of lead and arsenic based pesticides.
2. If it is bacteria, then why does it now only relate to accidences involving rusty metal?
The bacteria should be everywhere, in soil on rocks, tree barks, everywhere where you could get a cut or other wound?

Before every accident at a "farming site" could lead to "lackjaw" only after WWII the whole notion of rusty nails came to be.

And now only mostly infants of the age of 2-14 days after birth get tetanus, could it be maybe a involvement of the PDA and almost never happens after the 14 days of the child beeing born.
How and why?