DNA inoculation represents a novel approach to vaccine and immune ther
apeutic develop ment, The direct injection of gene expression cassette
s into a living host transforms a number of cells into factories for p
roduction of the introduced gene products, Expression of these deliver
ed genes has important immunological consequences and may result in th
e specific immune activation of the host against the novel expressed a
ntigens, The recent demonstration by laboratories that these immune re
sponses are protective in some infectious disease experimental models
as well as cancers is viewed with cautious optimism, Further, the rela
tively short development times, ease of large-scale production, low de
velopment, manufacturing, and distribution costs all combine with immu
nological effectiveness to suggest that this technology will dramatica
lly influence the production of a new generation of experimental vacci
nes and immune therapies, It is hoped that DNA inoculation will ultima
tely lead to new vaccines that are immunologically effective and econo
mically accessible to all nations.