Table 6. Cross-reactivity of mAbs against closely related and divergent H9N2 viruses.

^aUnless otherwise specified, all viruses listed are of the subtype H9N2. ^bNumbers in bold indicate homologous titers. ^c<indicated HI titers of <5. Colors show degree of difference between homologous titer and other titers with each change in shade indicating a 4-fold reduction.