| Less extensive drying allows retention of virus infectivity but results in a less stable product. |
| In experimental infection where very high doses were administered, infectivity has been found in the ileum, part of the intestine. |
| The classification of tissues shown in the table is based on titration of infectivity in mice by the intracerebral route. |
| This will often result in incalculably small amounts of possible infectivity potentially remaining in the final product. |
| The level of infectivity in the ileum in both diseases is significant from an early stage of infection. |
| The high level of mortality and infectivity of pneumonic plague is the driving force for the development of new and more effective vaccines. |
