rusty old steel...

i thought the bacteria could only survive where their is no oxygen present?
... rusted steel?

That is why a puncture wound is the most likely way to contract tetanus. The wound is deep into the body and may close itself before bleeding can occur, not allowing oxygen into the penetration.

If you bleed from a cut, your odds of getting tetanus are extremely low.
Like 0.many0's%. Not sure what you mean about rusted steel having no oxygen present. Rust, by nature, is O2+H2O+FE, so there would be oxygen present.

Hey, if you want a tetanus shot, by all means get one. Some folks here are just trying to put your mind at ease about the scrapes and cuts that go along with what we do.

But do what you feel is best for you.