well 4 months i guess is too late but probably you didn't catch it if hbsag negative, make vaccine anyway and asap so you will avoid it in the future, i'd make also hepatitis a vaccine when you go for hbv
if you want to be 100% sure you can do all hbv markers but make the vaccine first anyway since it won't make any harm
hbsag,hbsab, hbcag, hbcab,hbcab Igm, hbeag,hbeab, hbvdna pcr
those are the complete markers to check hbv
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