Alan is a 47-year-old man who has no documentation of a primary series of tetanus-containing vaccine. Which of the following would be an appropriate primary series for Alan?

a) DTaP today; Td in 4 weeks; Td 6 months after the second dose.

b) Tdap today; Tdap in 4 weeks; Tdap 6 months after the second dose.

c) DTaP today; DTaP in 4 weeks, DTaP 6 months after the second dose.

d) Tdap today; Td in 4 weeks; Td 6 months after the second dose.

Option D, Tdap today; Td in 4 weeks; Td 6 months after the second dose

Explanation:

In general, Tdap is given before Td to all those adults who have never been administered with Tdap earlier.

Also as per the publication of CDC, any individual who is of 7 years or older than this and has never been vaccinated by Td needs following schedule of medication

a) First primary dose

b) After the first primary dose the second primary dose of Td must be given in 4 weeks and

c) The third primary dose must be given after 6 to 12 months.

Hence, option D is correct