Industrial Medicine

chemical agents? It appears that a small beginning, although no more than a beginning, has been made. A tiny chink in the armour protectiing viruses has been uncovered and this provides a hint that more effective and more useful procedures may be developed if the validity of the underlying concepts is supported by further work. Of major importance in the eventual solution of this problem is information as to the nature of the metabolic systems which viruses require of host cells.