It is necessary to get vaccinated as having sex with prostitutes is a risk factor for transmitting HBV.
HBV has been found in vaginal secretions and can be transmitted by sex.Promiscuous individuals are more likely to get HBV.
Better to get vaccinated.
Rarely condom rupture may happen.
Also HBV can transmit from deep kissing.So i strongly suggest getting vaccinated.
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Usually it is a 3-dose series at 0, 1, and 6 month.
Studies indicate that immunologic memory remains intact for at least 20 years among healthy vaccinated individuals.
If wrong blood is transfused the patient may had transfusion reaction at that time.
Usually blood is checked for hepatitis B before transfusion and also checked for HIV and HCV.
Also cross-match is also done to check compatibility.
As of now if you think you have been transfused wrong blood you can ask the lab to do following test now.
It would have revealed at the time of transfusion reaction but not now.
An ABO incompatibility reaction can occur if you receive the wrong type of blood during a blood transfusion. Bit it is very rare.
Blood grouping and cross matching is performed before transfusion.
I think in 4 years new blood cells RBC WBC and platelets have already been formed many times.
ABO test will tell your blood group.
A different test called Coombs test can be tried.An abnormal (positive) Coombs test means you have antibodies that act against your red blood cells.
But it is most likely to be reported as Negative after 4 years.
ABO incompatibility is an immune system reaction that occurs when blood from two different and incompatible blood types are mixed together.
Coomb's test can help to diagnose this and is a type of ABO incompatibility test.