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Novel infectious diseases, such as COVID-19, are a significant public health threat. [30] Although human coronaviruses (CoVs) were known as major pathogens which caused respiratory illnesses, [31] [32] a new strain of coronavirus known as SARS-CoV caused an outbreak in 29 countries from 2002 to 2004.
The virus shows little genetic diversity, indicating that the spillover event introducing SARS‑CoV‑2 to humans is likely to have occurred in late 2019. [ 20 ] Epidemiological studies estimate that in the period between December 2019 and September 2020 each infection resulted in an average of 2.4–3.4 new infections when no members of the ...
Adenoviridae. Adenoviruses (members of the family Adenoviridae) are medium-sized (90–100 nm ), nonenveloped (without an outer lipid bilayer) viruses with an icosahedral nucleocapsid containing a double-stranded DNA genome. [2] Their name derives from their initial isolation from human adenoids in 1953. [3]
v. t. e. The human virome is the total collection of viruses in and on the human body. [ 1][ 2][ 3] Viruses in the human body may infect both human cells and other microbes such as bacteria (as with bacteriophages ). [ 4] Some viruses cause disease, while others may be asymptomatic. Certain viruses are also integrated into the human genome as ...
Realms. Adnaviria. Duplodnaviria. Monodnaviria. Riboviria. Ribozyviria. Varidnaviria. 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 ...
2.74 million (2015) [2] Lower respiratory tract infection ( LRTI) is a term often used as a synonym for pneumonia but can also be applied to other types of infection including lung abscess and acute bronchitis. Symptoms include shortness of breath, weakness, fever, coughing and fatigue. [3] A routine chest X-ray is not always necessary for ...
Cytomegalovirus. Cytomegalovirus ( CMV) (from cyto- 'cell' via Greek κύτος kútos - 'container' + μέγας mégas 'big, megalo-' + - virus via Latin vīrus 'poison') is a genus of viruses in the order Herpesvirales, in the family Herpesviridae, [3] in the subfamily Betaherpesvirinae. Humans and other primates serve as natural hosts.
Vietnam is located in the tropical and temperate zone and prone to zoonotic diseases. In recent years, the country has been affected by SARS, avian influenza A(H5N1), influenza A (H5N6), and COVID-19, although the spillovers of viruses from animals to humans is attributed to the agriculture-centered economy and animal consumption.