Vaccinology is the science and engineering of developing vaccines to p
revent infectious diseases. Guidelines come from knowledge of pathogen
esis and from successful past vaccines. The vaccine enterprise relies
on the evolution of appropriate science and technology. Governmental s
upport and industrial participation are key to successful development
of new vaccines. A large challenge for vaccinology is a vaccine which
protects against AIDS. Though misguided in its first decade, current v
accine research is directed to use of any and all viral antigens and t
o elicit both cell-mediated and humoral immune responses that are resi
dent, with memory, at the mucosal sites of viral entry. Recent seminal
discoveries guiding the future include selective elicitation of both
Type 1 and Type 2 immune responses, and prime-boosting using recombina
nt viral or DNA vectors and expressed antigens. Success in vaccinology
depends on simplification of the complex and on iterative processes i
n a well-defined pathway. The present and future of vaccinology are di
scussed in depth. (C) 1998 Elsevier Science Ltd. All rights reserved.