| 1 | But the behavior is hardly selfish. | |
| 2 | Rules had to be bent sometimes to get the vaccine to where it was needed as quickly as possible. | |
| 3 | According to this relationship, several new plaque assay methods, which had the advantage over routine method, were designed. | |
| 4 | The researchers began by removing two genes from a vaccinia virus that are necessary for its growth in normal cells. | |
| 5 | The detection methods for vaccinia virus were developed and provide a base for laboratory diagnosis of variola-related viruses. |