How is the dtap vaccine effective?

Dtap vaccine. It is very effective, the immunity lasts for up to 10 years , but now it is recommended to get a booster shot every 5 years instead of 10. I hope that answers your question. Good luck. .
Dtap vaccine. Dtap vaccine is 95% effective in preventing all three diseasesthe immunity for diptheria lasts for full 10 years, it is little lower for pertusses and higher for tetanus.So a booster dose is needed every 10 years.