< 0.1 : Insufficient immunity , booster vaccination recommended .
0.1 - 0.5 : Immunity given , booster vaccination will provide long-term immunity .
> 0.5-1.1 : Sufficient immunity , booster vaccination in 2-5 years .
>1.1-5.0 : Sufficient immunity booster vaccination in 5-10 years .
>5.0 : sufficient immunity ,booster vaccination in approx 10 year