History of Coronavirus

COVID-19

 Coronavirus History
Coronavirus are a big family of different viruses. some of them cause  the common cold in people. Other infects animals, including bats, Camels, and cattle. but how  did SARS-CoV-2 the new Coronavirus that causes Covid-19, come in to being?

Here is what we know about the virus that was first detected in Wuhan, China, in late 2019 and has set of a Global pandemic?    
                                                                                                                                                 Where did the coronavirus come from?

Experts says SARS coV-2 originated in bats.  That's also how the corona virus behind middle east respiratory syndrome (MERS) and serve acute respiratory syndrome (SARS) got started.

SARS CoV-2  made the jumps to Humans at one of Wuhan's open air "wet markets". They're where customers by fresh meat and Fish, including animals that are killed on the spot.

Some wet markets sell wild are banned species like cobras, wild boars, and raccoon dogs. Crowded conditions can let viruses from different animals swap genes . some times the virus changes so much it can start to infect nd spread among people.

still, the Wuhan market didn't sell bets at the time of outbreak. that's why early suspicion also fell on pangolins, also called scaly anteaters, which are sold illegally in some markets in China. some coronaviruses that infects pangolins are similar to SARS CoV-2.

As SARS CoV-2 spread both inside and outside China, it infected peoples who have had no direct contact with animals . That meat the virus is transmitted from one Human to another. it's now spreading in the U.S. and around the globe, meaning that people are unwittingly catching and the passing on the coronavirus. this growing world wide transmission is what is now pandemic .

Coronavirus Evolution:

scientist first identified a human coronavirus in 1965. it caused a common cold. later that decade, researchers found a group of similar humans and animal viruses and named them after their crown-like appearance. 

seven coronavirus can infect humans. The one that causes SARS emerged in southern China in 2002 and quickly spread to 28 other countries. more than 8000 peoples were infected by July 2003 and 774 died. A small outbreak in 2004 involved only four more causes. This coronavirus causes fever, headach and respiratory problems such as cough and shortness of breath.

MERS started in Saudi Arabia in 2012. Almost all of the near by 2500 cases have been in people who live in or travel or the Middle East. this coronavirus is less contagious than its SARS cousin but more deadly, killing 858 people. it has the same respiratory symptoms but can also cause kidney failure.