Vaccine design has helped to completely change the world as we know it because only less than a century ago there were many viruses and infections that were killing off the human species. Whether this was part of the world fighting back against man and the destruction of the planet we will never know. However one thing is for sure that with the ever increasing technology we find ourselves in a world that can stave off death for extended periods of time.
The use of science to modify and control vaccine design is helping medical and scientific researches to stay one step ahead of most of the deadly scenarios. The swine and bird flu were a big scare over the last few years but vaccinations are now available if the public wishes to use them. The only problem is that the vaccine design often cost large amounts of money and is not always readily available for everyone.
Vaccine design for the HIV virus and deadly retro viruses are being constantly tested in laboratories to keep the population safe from these diseases. The deadly diseases are often prioritized to get more funding for the modification of the vaccine design through government agencies which are attempting to clean their countries of deadly diseases.