Systematic Veterinary Virology

Control by Vaccines

VACCINES

• Once cattle have been infected with the disease, most are resistant to infection for many years or for life. However, live attenuated vaccines, killed vaccine and a sub-unit vaccine has been used in certain part of the world.
• The live vaccine gives at least 12 months protection after two doses. The inactivated vaccine gives protection for about six months protection. Animals can be vaccinated from six months of age and should then be revaccinated each year to ensure continued protection.