Which of the following tetanus toxoid-containing vaccines would be most appropriate to recommend for linda, a 67-year-old woman and grandmother of six with no record of receiving tdap?
a) dtap.
b) dt.
c) td.
d) tdap.

The aswer is D) Tdap

Explanation:

DTaP - diphtheria, tetanus, and Pertussis (whooping cough) protects young children;

DT - diphtheria and tetanus, protects young children;

Tdap - tetanus, diphtheria, and whooping cough, protects preteens, teens, and adults from 19 to 64 years old);

The Tdap vaccine, since 2010, has been recommended by ACIP, Advisory Committee on Immunization Practices, for adults from 64 years old and elder if they have close contact with an infant.  

which of what? i am confused