History of corona
History of corona
Coronaviruses are a diverse group of viruses. Some of these cause people to catch a cold. Animals such as bats, camels, and cattle are infected by others. But how did SARS-CoV-2, the novel coronavirus responsible for COVID-19, emerge?
Here's what we know about the virus that was first discovered in late 2019 in Wuhan, China, and has since spread throughout the world.
What Is the Origin of the Coronavirus?
SARS-CoV-2 is thought to have originated in bats, according to experts. Middle East respiratory syndrome (MERS) and severe acute respiratory syndrome (SARS) are both caused by coronaviruses.
At one of Wuhan's open-air "wet markets," SARS-CoV-2 made the leap to humans. Customers can purchase fresh meat and seafood, as well as animals that have been killed on the spot.
Wild or prohibited animals such as cobras, wild boars, and wild dogs are sold in some wint markets. Viruses from different animals can swap genes in crowded settings. When a virus undergoes significant alterations, it can begin to infect and propagate among people.
Despite this, the Wuhan market did not sell bats during the pandemic. That's why pangolins, also known as scaly anteaters, were initially suspected of being sold illegally in some Chinese marketplaces. SARS-CoV-2 is comparable to several coronaviruses that affect pangolins.
SARS-CoV-2 infected people who had no direct contact with animals as it spread both inside and outside China. This means that the infection gets passed from one person to the next. It's now spreading across the United States and around the world, which means that people are unknowingly receiving and transmitting the coronavirus. A pandemic has emerged as a result of this escalating international dissemination.
Evolution of Coronaviruses
In 1965, scientists discovered the first human coronavirus. It was the source of a common cold. Researchers discovered a collection of identical human and animal viruses during that decade and dubbed them after their crown-like appearance.
Humans can be infected by seven different coronaviruses. SARS was first detected in southern China in 2002, and it swiftly spread to 28 other countries. More than 8,000 people were involved.
By July 2003, 774 people had been infected, and 774 had died. In 2004, there were just four more occurrences in a tiny outbreak. Fever, headaches, and respiratory difficulties such as cough and shortness of breath are all symptoms of this coronavirus.
Thanks for reading