Hello there.
I can understand your concern.
No.
You don't have to start again.
You just need to complete the course and then take one booster dose every five years.
That will maintain the immunity.
Consult a general physician in person for further evaluation and management.
Best regards.
Dr. Anil Kumar Jain.
Bangalore.
Answered2017-07-28 13:09:11
Let others know if this answer was helpful