Producers often package the tetanus shot with other similar vaccines, so that it works to prevent more than one type of disease.
The authors found no differences in the age at onset of infantile spasms between immunized and non-immunized children; half of all cases in each group began before 5 months of age despite children immunized before 1970 not receiving the first dose until 5 months of age.
This rare but serious reaction to a tetanus vaccine may begin 2 days to 4 weeks after you receive the vaccine, and could last up to many months.