Always use antiseptic techniques in preparing and administering vaccines. Remember that vaccinations done under the very best of conditions will not always provide complete protection. However, when good vaccines are used according to instructions, maximum possible protection will be achieved. The purpose of any vaccine or bacterin is to render an animal resistant to a specific disease. All vaccines cause an animal to build antibodies or other protection against specific diseases in the same manner as if it had contracted the diseases.
Some vaccines require two injections to achieve maximum protection.
Don't save unused parts of bottles of vaccines for future use. They can become contaminated with undesirable organisms or become ineffective. Always keep records on the vaccines used. Read and follow the directions on all the biological products used. Your calves will be worth more money if they are properly dehorned, castrated, branded and vaccinated.