This system has the potential to remove mercury from polluted soils and water to comply with the new and more stringent regulations. DNA Vaccines Vaccines are one of the most cost-effective medical technologies in all of history. Using DNA as a vaccine is a new approach that has the potential to eliminate many of the problems associated with traditional vaccines. Traditional vaccines require the production of pathogenic microbes or their antigenic components. Killed or subunit vaccines require multiple injections, thereby increasing cost and creating logistical problems.
Recombinant vaccines require a non-pathogenic vector that can only be used once.
For livestock and poultry there are issues that can limit the use of vaccines. Animals experience stress when being rounded up for vaccination, making multiple vaccinations less desirable. The cost of the vaccine can be too much for ranchers and farmers when the market for animals declines. Yet, in most cases, there is a cost benefit to vaccines because healthy animals produce higher yields and fewer animals are lost to disease. In DNA vaccines, a small fragment of DNA from pathogens is injected into animals.