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SARS‑CoV‑2 belongs to the broad family of viruses known as coronaviruses. [28] It is a positive-sense single-stranded RNA (+ssRNA) virus, with a single linear RNA segment. Coronaviruses infect humans, other mammals, including livestock and companion animals, and avian species. [104]
Virus classification showing major ranks This is a list of biological virus families and subfamilies. See also Comparison of computer viruses. This is an alphabetical list of biological virus families and subfamilies; it includes those families and subfamilies listed by the ICTV 2023 report. [1] For a list of individual species, see List of ...
The infection of new-born chicks was characterized by gasping and listlessness with high mortality rates of 40–90%. [16] Leland David Bushnell and Carl Alfred Brandly isolated the virus that caused the infection in 1933. [17] The virus was then known as infectious bronchitis virus (IBV).
Orthopneumoviruses can cause diseases that range from a less-severe upper-respiratory illness to severe bronchiolitis or pneumonia. Orthopneumoviruses are found among sheep, cows, and most importantly humans. In humans, the orthopneumovirus that specifically impacts infants and small children is known as human respiratory syncytial virus. [2]
A COVID-19 vaccine is intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 . Prior to the COVID-19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute ...
[40] [33] So we expect the highest concentration of virus-containing droplets to be directly in front of an infected person, which suggests that the risk of transmission is greatest within three to six feet of the source of the infection. [10] [3] But breath contains many droplets that smaller than 100 micrometres in size, and these can stay ...
A virus that can lead to polio-like paralysis in children is on the rise in California - and there is no known cure.. Enterovirus D68 (EV-D68) was detected at a medium level at 20 wastewater sites ...
Respiratory syncytial virus (RSV), [a] also called human respiratory syncytial virus (hRSV) and human orthopneumovirus, is a virus that causes infections of the respiratory tract. It is a negative-sense, single-stranded RNA virus. [2] Its name is derived from the large cells known as syncytia that form when infected cells fuse. [2] [3]