FIG. 2.

Neonatal mouse mortality and average survival time data from infections with viruses. Mice were inoculated subcutaneously in the axial region at exactly 24 h of age with 5 μg of RNA from an in vitro transcription reaction mixture of each expression virus. Two separate pooled litters totaling 15 to 20 mice were used for each virus. Percent mortality and average survival times were calculated as described in Materials and Methods.