Serum Neutralizing Activity of Vaccinated SPF Chickens against FAdV-4 Two-week-old SPF chickens were immunized via different routes and with different doses of the rHN20 live vaccine candidate, and the neutralizing activity of the serum against FAdV-4 was examined at 7 and 14 days after immunization (Figure 1)

Serum Neutralizing Activity of Vaccinated SPF Chickens against FAdV-4 Two-week-old SPF chickens were immunized via different routes and with different doses of the rHN20 live…