I had a Hep B vaccine series before and it showed non-reactive on antibodies and doctor ordered another round and earlier this year it showed reactive to antibodies after the 2nd series of shots. 

Any thing to worry or to get tested?  This incident happened last week.Your previous reply say no to previous similar questions but wanted to be sure as my mind is racing and the liver side of my body is hurting.   Some sites say nothing to worry and some may possible trasnsmission.  Thank you.

Hepatitis B virus (HBV) really should be looked at as a sexually transmissIBLE STD that is rarely sexually transmittED. In my nearly 50 years in the STD business, I don't recall ever having or being aware of anyone who acquired HBV sexually from an opposite sex partner. Most sexual transmissions over the decades have occurred in men having sex with men. And the virus is never transmitted by non-intimate contacts of the sort you mention above. That someone had blood or saliva on their hands when shaking hands zero risk, even with cracked skin or other wounds on the exposed surfaces. And the chance any particular person -- even the most sexually active (and sexually irresponsible) persons -- has an active, transmissible HBV infection is almost zero as well. Finally, with any detectable antibody at all after HBV vaccination, there is zero risk even if massively exposed to the virus.

As for varying advice online, you won't see much disagreement if you limit searching to professional sites (academic medical centers, public health, etc) or at least professionally moderated, like this one. Avoid sites run by and for people with the problem you're worried about or at risk (e.g. Reddit). In any case, those that say "nothing to worry" are right.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD