The word “corona” is used for a wide family of viruses that infect mammals, including birds and humans.
There are hundreds of corona viruses found in the world, but so far there are only 7 types that affect humans. Four out of these seven coronary viruses show symptoms such as cold in humans, while the remaining three corona viruses carry serious risks to humans.
All 7 viruses can cause infections in the upper part of the respiratory tract, and their symptoms can be like cough and cold, while other symptoms include closed nose, sore throat, headache and fever.
According to the US Center for Disease Control and Prevention (DCP), very few coronavirus systems cause complications at the lower respiratory tract, such as pneumonia. These complications are more common in children, the elders, and people who already have an illness or lack of immune strength.
The 4 corona viruses found in humans are very common, known as 229E, NL63, OC43 and HKU1. These viruses usually show minor or moderate symptoms.
According to the CDP, most people in the world suffer from at least one of these viral infections in their lives, and most people are cured.
In addition to the four viruses described above, the remaining three were primarily identified in animal infections, but over time, the virus passed through evolutionary stages to humans as well.
Corona Viruses that have become a serious threat to human health.
SARS Cove (SARS-CoV)
SARS-CoV produces “Severe Acute Respiratory Syndrome (SARS). According to the World Health Organization, the first patient with the virus appeared in southern China in November 2002.
It is also believed to have originated from bats and moved from there to other animals after which it infected humans.
In 2003-2002, more than 8,000 cases were reported in 26 countries and a total of 774 people were killed worldwide.
In mid-2003 it was controlled by quarantine and isolation. There is no patient in the world at this time, but if the virus reappears, it can seriously affect humans.
Mars Cove (MERS-CoV)
MERS-CoV has Middle East Respiratory Syndrome (MERS). According to the World Health Organization, it came to Saudi Arabia in September 2012, but later the cases of the virus came out of Jordan.
Humans have the virus infected with camels, and the virus also has the potential to transmit the infected human being closer.
More than 2400 cases were reported in 27 countries of the virus, most of them from Saudi Arabia. The virus also spread to South Korea later in 2015, affecting 186 people and causing 36 deaths.
SARS Kov-2 (SARS-CoV-2) or the new Coronavirus
SARS Coo2 is the newest virus in the Coronavirus family and the infection it produces is named as COVID-19. The virus surfaced in Wuhan, China, last December, when doctors saw a sudden increase in cases of pneumonia in people.
According to reports, the virus began to spread to Wuhan’s meat market. It, too, was transmitted from animals to humans, but its exact cause is still unclear.
Covid-19 is currently engulfing the world and its number of patients has reached 1.5 million while more than 100,000 people have been killed so far.