Hepatitis B

Do I have to wait six months for Hepatitis B vaccinations for Ambulance Job? So basically the predicament I am in right now is as follows. I need to present proof that I’ve had Hepatitis B vaccinations. That or I have to get them. But the later requires 6 months for my antibodies to develop. What are my options for this problem. Should I spend money on a blood work to see first if I have the antibodies. Whats the what what.

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