There is always the concern that one injection site may produce superior immunity to another. Research has shown that all common injection sites can give satisfactory results if done properly. When selecting the injection site, consideration should be given to ease of application, reaction at the injection site and human safety. Comparisons to decide which injection site gives the best result in an individual operation may be helpful. Monitoring Vaccination should be monitored to ensure the full potential of the vaccine is achieved.
Serology is useful in evaluating the birds' response to vaccination.
VN shows the level of neutralizing, or protective, antibodies. The antibody level and uniformity of the flock's immune response will help give some indication of the vaccination crew's technique. Evaluation should also include visits to the field to work with the vaccination crew. Vaccination crews should be educated in proper technique and vaccine handling. To evaluate the crew's vaccination technique, the injection site should be examined shortly after vaccination.