93-99%+. Drug company data submitted for review show the vaccine produces a 4x or better increase in protective response in 93-99% of the study group. Researchers consider the 4x boost evidence of protection. Given the decline of tetanus to 40 or less per year in the US it appears something is going well.
Ted. Very effective!
When adolescents and adults are scheduled for their routine tetanus and diphtheria booster, should they get vaccinated with td or tdap?
Depends. Pertussis is making a comeback and the adults are the no-longer-immune reservoir. So if no tdap in a long time, get tdap. If had one w/in 15yrs, then td ok. No harm in going w/tdap and may help protect the "herd.". Read more...