The hepatitis B vaccine is made in a chemistry lab. No human blood is used in the vaccine, so you cannot get hepatitis B from the vaccine. Although the vaccines are almost identical, doctors may order different brands. Both vaccines will protect you against the hepatitis B virus. In general, the hepatitis B vaccine series includes three shots that are given over a six month period.
Adults receive shots in their arm, and babies in their leg.
After the first dose of vaccine, you will start getting some protection within several weeks. So it's never too late to start. It is very important to complete the entire series of the vaccine. The vaccine can be given in your doctor's office or a local health clinic. All newborn babies should be vaccinated, especially if the mother is of Asian descent or if a woman knows she has hepatitis B. All children up to age 18 years should be vaccinated as well.