Cancer :  Regulatory  Proteins The point is clearly and helpfully made that Ross Sarcoma Virus has its strongest impact on young chickens. Also the leucosis viruses are only likely to produce leukemia, if they infect young chickens. In other articles the point is made that a sequence of events is required before the rapidly dividing cells of a highly malignant tumour can be established. One of those events is a cell needs to be in a healing (cell reproducing) phase. This means the … [Read more...]