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You need to check other HBV
indices like Anti-HBcAg
, HBeAg also. Without this nothing can be said about transmission. ALP is normal and it does not indicate that they are infected. Nothing to worry. It is abnormal only if rained more than 3 times the normal value. Kindly get the other Hepatitis B
tests done as well and consult with your Doctor about the risk of transmission to others.