<0.1 : Insufficient immunity,booster vaccination recommended
0.1-0.5 :Immunity given,booster vaccination will providelong-term
>0.5-1.1 :Sufficient immunity , booster vaccination in 2 to 5 years.
>1.1-5.0 :Sufficient immunity , booster vaccination in 5 to 10 years.
>5.0 :Sufficient immunity ,booster vaccination in appron 10 years.