Nevertheless, the report calls for more research and even small-scale field trials of the technology.
Dr. Coriell ran the field trials of the resulting Salk vaccine.
The department, which issues permits for field trials of genetically engineered crops, said it envisioned moving to a tiered system.
Meanwhile, at Oregon State University, Tom Michaels was completing his doctorate, running field trials of truffle cultivation research.
It claimed that its field trials of neonicotinoid pesticides on bees showed that "effects on bees do not occur under normal circumstances".
He also said large-scale field trials of cattle vaccines were being designed, but said a usable vaccine was many years away.
But earlier this year, the African Biodiversity Centre found field trials of GM crops were already under way in seven African countries.
Dr Tanaka is currently overseeing the first field trials of a blue rose developed by Suntory's subsidiary, Florigene.
The Environmental Protection Agency is threatening to fine two agricultural biotechnology companies for not complying with their permits for field trials of genetically modified crops.
Heal's field trials of new weapons last several weeks or months and involve sometimes just a few deputies and sometimes as many as five hundred.
Cameroon, Kenya, Malawi, Nigeria and Uganda are conducting field trials of biotech crops, the final step before full approval of commercialisation.
