CASP3 and viral infectious disease: Moreover, release into flavopiridol at 72 h after the viral infection by 48 h results in abrupt cell death of the majority of the population, compared with release into DMSO, in which cells continue to cycle (cell apoptosis rate of 60.1 ± 5.3% for the sequential combination of AdHTVP2G5-rev-casp3 and flavopiridol vs. 1.1 ± 2.9% for control).