Part of good herd management is to properly handle and store vaccines so they will provide effective disease protection for animals.
This will help develop a strong immunity to the diseases which you are vaccinating for.
Be sure to buy vaccine from a dealer who uses good storage and handling. After purchase, store vaccine in a cool, dark place such as a refrigerator as soon as possible. Do not leave vaccines on the dashboard of your vehicle because temperatures, light or freezing will cause inactivation.
Properly store vaccines until you are ready to use them; then, expose only the you will use in about one hour. If you will be working several animals, keep in a cool, insulated container and remove them as needed.
Modified live vaccines are especially sensitive to being mishandled.
Most of these vaccines must be rehydrated by adding a sterile solution to the freeze-dried material. Use a transfer needle to remove the fluid and transfer it into the vial containing the vaccine. If you are using a syringe and needle to transfer the diluent, use a clean needle to withdraw vaccine to keep from contaminating the entire vial. In addition to preventing contamination, it may help keep "knots," or abscesses, from forming at the injection site.