Nagano Y, Lee T
C R Seances Soc Biol Fil. 1978;172(4):805-8.
Fragments of organs from mice inoculated with Newcastle disease virus were incubated at 30 degrees C. Lungs and liver produced thermolabile virus-inhibiting factor (IF) or interferon at earlier stages. The spleen, lymph nodes and thymus produced thermolabile IF at earlier stages and thermostable IF at later stages.