There is no standalone tetanus shot available in the states anymore, just the dTap which is a combination shot with an absurd amount of aluminum.

by not using live viruses they have to couple the dead virus to a toxin in order to generate a "robust" immune response.

When they combine multiple viruses into one vaccine (mmr / dtap) they have to ramp up the amount of the toxin included. Most new shots use aluminum, some still use mercury