Abstract
Since Edward Jenner’s 1796 experiment, now unacceptable to institutional review boards (he inoculated a boy with pus from a cowpox-infected milkmaid’s scab, then with smallpox), scientists have tested a plethora of vaccine concepts. Louis Pasteur discovered, somewhat by accident, the first “live-attenuated” vaccine (it was an aging culture of fowl cholera), a weakened preparation of the disease agent that still replicates in the host and generates immunity.
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Notes
- 1.
Zagury later injected his vaccine into 18 children in Zaire, with permission from Zairean, but not European, officials, and was criticised on ethical grounds.
- 2.
The phases of clinical research are labeled I–III; phase I trials are small and address biological response and safety concerns; phase II are larger, often in the range 1K–3K and generate data about biological action and limited information about efficacy; phase III are large licensure trials, with numbers depending on the “attack rate” of the disease.
- 3.
An author of this book (W.D.W.) entered the HIV field when HIVNET was founded.
- 4.
“The focus on drugs and vaccines made sense a decade ago, but it is time to acknowledge our best hunches have not paid off…we need to put increased emphasis on basic science…” Field’s comments reflected the eternal tension between mechanists and empiricists. Several years later, his colleagues Bruce Weninger and Max Essex, prompted by NIH’s creation of AVRC headed by David Baltimore (a Nobelist in biology and medicine but not a vaccinologist) replied, again in Nature: “the theorists leisurely pursue new knowledge to build models to explain and perhaps offer elegant solutions. The empiricists apply existing knowledge to seek pragmatic answers…”
- 5.
Francis was furious about the June 17th decision, saying understandably, if hyperbolically, “They had no idea that what they did was kill vaccines.”
- 6.
Statisticians warn against such post hoc subgroup analyses, because the trial was not designed with sufficient power to estimate effects in smaller groups.
- 7.
W.D.W. thanks Fusheng Li of the FHCRC for relating these ideas.
- 8.
If the “primary viremia drives the epidemic” theory is true, such a vaccine might provide a benefit, but it would certainly be hard to convince the FDA to license it based on data resembling Figure 12.2.
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Wick, W.D., Yang, O.O. (2013). Can a T-Cell Vaccine Block Escape?. In: War in the Body. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7294-0_12
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