A69 year-old man received td vaccination 4 years ago. he is preparing to travel to see his newborn granddaughter next month. what vaccine containing tetanus, diphtheria, and/or pertussis would be most appropriate for him?

Tdap vaccine.

Explanation:

Td vaccination may be defined as the booster vaccine that cantains the vaccination against the  diphtheria and tetanus. This vaccination is given to the children under the age of 7.

The man with 69 year old received Td vaccination 4 years ago. He is travelling to see newborn granddaughter next month. The Tdap vaccine containing the diphtheria, pertussis and tetanus would be most appropriate for him.

Thus, the answer is Tdap vaccine.

either two or three