Exposure to contaminated blood. So, if you are sharing needles as part of your heroin use, might I suggest it is a suboptimal idea. Sex. And maybe maybe maybe sweat (PubMed). Now whatcha gonna do at the gym with that sweaty barbell?
Reactivates with rituximab and ofatumumab (anti CD20); check before starting.
Hepatitis (acute and chronic), cirrhosis and hepatic cancer. Can get a 'flair' reaction with e seroconversion.
Lamuvudine 100 mg po qd to tid and famciclovir both suppress the disease but resistance occurs over time. Interferon also an option. Entecavir is approved for chronic Hepatitis B but it breeds resistance in HIV (PubMed).
There is a vaccine. It is very effective, good for at least 30 years . However in HCW's who do not respond to the initial series do not get a better response with more jabs.