Common reasons for vaccination failure

• Lack of maintenance of cold chain from the time of manufacture till vaccination.
• Poor immune response in weak and improperly fed animals.
• Lack of herd immunity due to only a few animals being vaccinated.
• Poor quality of vaccine - Quality will deteriorate if repeatedly thawed and cooled.
• Low efficiency or ineffective vaccine – may occur in case of strain variation.(eg.FMD)

   Click here to watch awareness film on vaccination.