Half of the antibodies generated by the tetanus vaccine may last up to 14 years, which is longer than previously thought (This is known as the half-life.)
However, research published in Clinical Infectious Diseases points to the possibility that these regular boosters may not be necessary for adults who've been childhood vaccines.
A 2016 study that looked into tetanus immunity in 546 adults found that the vaccine provided at least 30 years of protection.
In general the CDC Trusted Source suggested receiving tetanus vaccinations no more than every 10 years.
"Your body will also remember tetanus, even if you are low on antibodies," he says. "Your body will immediately see it as foreign, and then your B-cells, which are antibody-manufacturing cells, will crank out antibodies as soon as the threat comes on."