As summer vacation for students enters its final month, the time has come for some to receive the state's required immunizations before returning to classes. (utahpubliceducation.org)
Although some kennels require immunization every 6 months, annual booster vaccination with B. bronchiseptica vaccines is considered adequate for protection. (clearlakevetclinic.com)
Immunization against contagious diseases is only effective when «herd immunity» is reached, which requires immunization of as much as 95 % of the population. (scientificamerican.com)