Live attenuated versus killed virus vaccines.

The discussion of the problems of production and use of killed and live virus vaccines shows that the theoretical, basic concepts of the alternative vaccination procedures are equivalent in regard to the ideals of calculable potency and safety. If one compares the present stages of development, then it becomes evident that the advantages of live viral vaccination are due to greater potency. However, killed virus vaccines are safer. Nevertheless, these differences are not without limits. In some vaccinating procedures, the live virus vaccine is the safer of the two.