History and other unknown facts about Covid-19

History of Coronaviruses

Why coronavirsus got this name?

Ø  It has crown shaped structure on the viruses structure. Covid-19 denotes that COrona VIrus Disease and the number 19 describes that the year the virus spreaded, founded and tested.

year and other unknown facts about the virus

Ø  It was spreaded and known from the Wuhan city placed in china (Asia) in December 1 in the year of 2019 (1.12.2019)

Ø  Since 2003, 5 new human corona viruses have been discovered. Three of these are group I viruses that are closely related and likely represent the same viral species. In 2004, van der Hoek et al³² reported the discovery of a new human corona virus, NL63, isolated from a 7-month-old girl with coryza, conjunctivitis, fever and bronchiolitis. Using a novel genomic amplification technique, these investigators were able to sequence the entire viral genome. Phylogenetic analysis demonstrated that this virus was a group I corona virus related to 229E and transmissible gastroenteritis virus, a virus of pigs. Screening of 614 respiratory specimens collected between December 2002 and April 2003 turned up 7 additional individuals who tested positive for NL63. All had upper or lower respiratory tract disease or both.

Ø  Corona viruses are a group of related viruses that cause diseases in mammals and birds.

Ø  In humans, corona viruses cause respiratory tract infections that can be mild, such as some cases of the common cold (among other possible causes, predominantly rhinoviruses), and others that can be lethal, such as SARS, MERS, and COVID-19. Symptoms in other species vary: in chickens, they cause an upper respiratory tract disease, while in cows and pigs they cause diarrhea.

Ø  There are yet to be vaccines or antiviral drugs to prevent or treat human corona virus infections Corona viruses constitute the subfamily Orthocoronavirinae, in the family Coronaviridae, order Nidovirales, and realm Riboviria. They are enveloped viruses with a positive-sense single-stranded RNA genome and a nucleocapsid of helical symmetry.

Ø  The genome size of corona viruses ranges from approximately 27 to 34 kilo bases, the largest among known RNA viruses.

Ø   The name corona virus is derived from the Latin corona, meaning "crown" or "halo", which refers to the characteristic appearance reminiscent of a crown or a solar corona around the virions (virus particles) when viewed under two dimensional transmission electron microscopy, due to the surface being covered in club-shaped protein spikes.