Effect of Immunosuppression on Newcastle Disease Virus Persistence in Ducks with Different Immune Status
Figure 1
Mean antibody titre responses with respect to days (D) after challenge in immunosuppressed (IS) and nonimmunosuppressed, nonvaccinated ducks: (a) low antibody level (group 1); (b) medium antibody level (group 2); (c) nonimmunized (group 3).
