Coronavirus is a common virus that can infect humans and various animals such as bats and alpacas. Human coronaviruses are abundant and usually cause respiratory infections. Most often it is a minor illness such as a cold. However, several coronaviruses, including Middle East Respiratory Syndrome (MERS), especially in visitors to Saudi Arabia or its region, and Severe Acute Respiratory Syndrome (SARS), which are mostly seen in travelers from China and from there. It can be more severe and sometimes life-threatening — a human infection.
Coronaviruses are found in various species of bats and birds and are considered to function as natural hosts. Analysis of the molecular clockwork of the corona virus shows that the most recent ancestor of this virus existed around 10,000 years ago. This relatively young age contrasts with the ancient evolutionary history of their supposed natural hosts, which began to diversify tens of millions of years ago. Here we attempt to resolve this difference by applying a more realistic evolutionary model that previously revealed the ancient evolutionary history of other RNA viruses.
Scientists first identified the human coronavirus in 1965. It causes the common cold. Later in that decade, researchers discovered a similar group of human and animal viruses and named them after their crown-like appearance.
Seven coronaviruses can infect humans. The cause of SARS emerged in southern China in 2002 and soon spread to 28 other countries. As of July 2003, more than 8,000 people have been infected and 774 have died. In the minor outbreak of 2004, there were only four left. This corona virus causes respiratory problems such as fever, headache, cough, and shortness of breath.
MERS started in 2012 in Saudi Arabia. Nearly all of the approximately 2,500 cases occur in people living in or traveling to the Middle East. The coronavirus is less contagious than its SARS cousin, but more deadly, killing 858 people. It has the same respiratory symptoms, but can also lead to kidney failure.
The human coronavirus is responsible for the majority of upper respiratory tract infections in children. Since 2003, at least five new human coronaviruses have been identified, including the severe acute respiratory syndrome coronavirus that causes significant morbidity and mortality. NL63, which represents the newly identified group of Group I coronaviruses, including NL and New Haven coronavirus, has been identified around the world. This virus is associated with upper and lower airway disorders and is probably a common pathogen in humans. The global distribution of the newly identified HKU1 Group II coronavirus has not been established. Coronaviology has grown rapidly in recent years. The SARS epidemic has put the animal coronavirus into the limelight.
In late 2019, a virus that was clearly closely related to the SARS coronavirus emerged in Wuhan, China. The virus, which was later named Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), causes a disease similar to SARS, known as COVID-19, which is mainly characterized by fever and respiratory symptoms. Past. The virus is also very contagious. By early 2020, the virus had spread across China, carried by travelers from affected areas, and reached the United States and Europe. In March, the World Health Organization declared the outbreak a pandemic, and to curb its spread, access to and to many countries is severely restricted. In many areas, schools and many businesses have closed and bans have been imposed. This encourages people not to leave their homes.
Researchers looking at the coronavirus and bats are familiar with a number of studies. A 2017 survey of 12,333 bats in Latin America, Africa and Asia found that nearly 9% carried at least one of 91 strains of the coronavirus. The author estimates that there are at least 3,200 coronaviruses that infect bats. In addition, there are more than 1400 species of bats. Understanding who is susceptible to the corona virus is not an easy task. Bats are very diverse and successful creatures. Evolutionarily speaking, fruit-eating bats differ from insect-eating bats about 50 million years ago.
When asked to describe past events, historians immediately emphasize the importance of context. If you want to understand how or why something happened, you need to pay attention to the local situation. But there is something about the epidemic that has elicited a reaction from historians. It is a desire to identify universal truths about how society reacts to infectious diseases.
Historians are good at recording past trendy dramas, but they are not very familiar with divination. How much should you worry about Covid-19? Some experts warn that half of the world’s population will be infected by the end of the year and more than 100 million people could die. History has indeed led to epidemics, chicken pox, boils, cholera, influenza, Marburg virus disease, and outbreaks of Middle East respiratory syndrome. However, epidemic disasters that kill millions are extremely rare, and few have occurred in the past several thousand years.