Emerging and reemerging viral infections in globe with special emphasis in India - A review

It has long been recognized that pathogens, such as viruses, parasites, and other microorganisms, emerge change over time. Viruses are powerful infectious agents have co-evolved with humans responsible for several serious illnesses in people. There is no herd immunity most humans, making emerging particularly the RNA more dangerous. The high mistake rate of polymerases copy viruses' genomes gives them ability to adapt quickly changing local global environments. Through mutation (as case Dengue viruses), reassortment influenza recombination, they can evolve at a rapid (polioviruses). A viruses (such H1N1 H5N1), which caused numerous outbreaks, epidemics, pandemics around world, finest example reemerging. complex host-pathogen ecology co-evolution microbes their hosts linked emergence reemergence novel diseases. Human viral illness an ongoing problem affects nation's social economic growth.