Found this on the CDC WEBSITE.
The hepatitis B vaccine became available in the United States in 1981. The vaccine was initially recommended for high-risk groups, such as healthcare workers, intravenous drug users, and people with multiple sexual partners. In 1991, the Centers for Disease Control and Prevention (CDC) recommended that all infants receive the vaccine. A recombinant hepatitis B vaccine became available in 1986.
Those of us who are over 60 don’t need it :).