Hepatitis B is a bloodborne pathogen. Infants and toddlers are at essentially zero risk of contracting it unless their parents, siblings, or other caregivers are Hep B positive. Even then, the chances of transmission are very small unless the infected person is extremely careless. 99.9% of infants and toddlers have absolutely no need for the Hep B vaccine, and it is utterly ridiculous that it has been added to the list of required childhood vaccines. In my personal opinion, the vast majority of adults don't need the Hep B vaccine either, unless they will be having frequent potential exposures (married to/living with an infected person, working in labs with Hep B virus, emergency medical personnel, travelling to countries with known high rates of Hep B or poor sanitation, etc).
Hepatitis B is a bloodborne pathogen. Infants and toddlers are at essentially zero risk of contracting it unless their parents, siblings, or other caregivers are Hep B positive. Even then, the chances of transmission are very small unless the infected person is extremely careless. 99.9% of infants and toddlers have absolutely no need for the Hep B vaccine, and it is utterly ridiculous that it has been added to the list of required childhood vaccines. In my personal opinion, the vast majority of adults don't need the Hep B vaccine either, unless they will be having frequent potential exposures (married to/living with an infected person, working in labs with Hep B virus, emergency medical personnel, travelling to countries with known high rates of Hep B or poor sanitation, etc).