Emerging and emerging viruses

In the 21st century, the world has been facing several emerging viral epidemics. These viruses are divided into two categories, including emerging viruses and re-emerging viruses. Factors, such as climate change, global warming, and some eating habits will have irreversible effects on human, animal, and environmental ecosystems. These emerging or re-emerging infectious diseases have significant effects on the world economy and health. The peak of this type of infectious disease appeared in the 1980s with a viral epidemic called human immunodeficiency viruses (HIV). These emerging or recurring viruses have affected both livestock and humans.There is evidence that these emerging or re-emerging viruses, influenced by the environment and the human diet are also affected by climatic cultures. Therefore, it would be possible to identify the center areas for the emergence or re-emergence of these viral diseases. In this review article, it has been attempted to identify world resources and the way we should be prepared for a confrontation with these deadly viruses through the study of these epidemics, emerging, and re-emerging viruses, since the mutated viral infections may emerge and re-emerge in the near future.For this review study, the keywords, including COVID-19, Coronavirus, SARS-COV2, Influenza virus (H1N1), Zika virus, HIV1 virus, Hanta virus, Ebola, Influenza (H5N1), Nipah, Hendra, West Nile fever, SARS- COV1, MERS-CoV were collected in PubMed, Scopus, Google Scholar, and other reputable databases.