Viruses Vaccine Development

Human creativity already creates a virus vaccine that already works in all over the world, to make some country free from certain diseases. Beside the vacccine development, by progress the development in controlling of infection diseases through improved sanitation, safer water supplies, the development of antibiotics and vaccines, and better medical care have dramatically reduced the threat to human health from these agents.

An ambicious program sponsored by World Health Organization, to vaccinate all people at rist for the disease. Poliovirus has been eliminated from Americas, and measles virus eliminated from North America, by intensive vaccination programs. Vaccine exist fro the control of many other viral diseases, such as mumps, rabies, rubella, yellow fever and Japanese encephalitis.

Viruses are capable or very rapid change, both from drift due to necleotide substitutions that may occur at a rate 10o fold greater than that of the plants and animals that they infect, and from recombination that leads to the development of entirely new families of viruses. This makes it difficult to trace the evolution of viruses back more than few millennia or perhaps a few million years.