Some vaccines are not generally recommended for use in shelters at all because they are unlikely to provide protection against disease. (animalsheltering.org)
A booster vaccination is required once a year to maintain levels of protection against these diseases. (celiahammond.org)
Babies are born with protection against some diseases because antibodies (proteins made by the body to fight disease) were passed to them by their mothers through the placenta. (kidshealth.org)