|Animal viruses cause various types of infection. In lytic infections, the virus will break open or lyse the host cell, resulting in the destruction of the host cell. Other viruses may cause persistent infections. In this type of infection, the virus may go dormant and be reactivated at a later time. The host cell may or may not be destroyed. Some viruses can cause persistent infection in different organs and tissues at the same time. Latent infections are a type of persistent infection in which the appearance of disease symptoms does not happen immediately, but follows after a period of time. The virus responsible for the latent infection is reactivated at some later point, usually prompted by some type of event such as infection of the host by another virus or physiological changes in the host. HIV, Human Herpes viruses 6 and 7, and the Epstein-Barr Virus are examples of persistent virus infections that are associated with the immune system. Oncogenic viral infections cause changes in host cells, turning them into tumour cells. Open Access journals make a quick review of articles and inform the authors within twenty one days of submission with the help of 3000 editorial team and quality review board which is ready to offer useful and informative results. Most of the peer-reviewed open access journals of OMICS Group is indexed in well-known indexing services like PubMed, Scopus, AGORA, ISI, ProQuest, Gale, Chemical Abstracts, and HINARI etc. Articles published in OMICS Group journals are permanently archived in the respective peer reviewed journals thus providing immediate and permanent access to individual papers and application of the scientific information. So, it is providing chance to get attract more number of students towards scientific research.