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An RNA virus is a virus characterized by a ribonucleic acid based genome. [1] The genome can be single-stranded RNA ( ssRNA ) or double-stranded ( dsRNA ). [ 2 ] Notable human diseases caused by RNA viruses include influenza , SARS , MERS , COVID-19 , Dengue virus , hepatitis C , hepatitis E , West Nile fever , Ebola virus disease , rabies ...
The human virome in five body habitats. (A) All of the viruses detected in the five body habitats . Each virus is represented by a colored bar and labeled on the y-axis on the right side. The relative height of the bar reflects the percentage of subjects sampled at each body site in whom the virus was detected.
A viral disease (or viral infection) occurs when an organism's body is invaded by pathogenic viruses, and infectious virus particles (virions) attach to and enter susceptible cells. [ 1 ] Examples are the common cold , gastroenteritis and pneumonia .
Also sometimes called the Norwalk virus or winter vomiting bug, norovirus is an extremely contagious virus. It is a common cause of illness outbreaks on cruise ships, where more than 90% of ...
The virus is distributed worldwide and, in temperate regions, has a seasonal distribution generally following that of RSV and influenza virus during late winter and spring. [ 3 ] [ 11 ] Serologic studies have shown that by the age of five, virtually all children worldwide have been exposed to the virus.
Orthopoxvirus is a genus of viruses in the family Poxviridae and subfamily Chordopoxvirinae.Vertebrates, including mammals and humans, and arthropods serve as natural hosts. . There are 12 species in this gen
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. [1] Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. [2] [3] Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity.
It does this by making the cell copy the virus's DNA or RNA, making viral proteins, which all assemble to form new virus particles. [37] There are six basic, overlapping stages in the life cycle of viruses in living cells: [38] Attachment is the binding of the virus to specific molecules on the surface of the cell. This specificity restricts ...