Recently, news about Covid-19, which is caused by the new Corona virus, has been heard everywhere. However, it may be best to first become familiar with the term coronavirus during the 2003 Acute Respiratory Syndrome (SARS) outbreak

Covid-19 and SARS both occur through the corona virus. The virus that causes SARS is known as SARS-Corona virus (SARS-CoV), while the Covid-19 virus is known as SARS-Corona-2 virus (SARS-CoV-2). There are other types of human coronaviruses

Despite the same name, there are differences between the two viruses. We will deal with this issue in more detail below

Corona virus is a very diverse family of viruses that includes a wide range of hosts, including humans. However, the greatest diversity of coronavirus is seen in bats

Sharp, crown-like bumps appear on the surface of the corona virus. Corona means “crown” in Latin and the name of this virus originates from here

In most cases, the human corona virus causes mild respiratory illnesses such as colds. In fact, four types of human coronaviruses cause 10 to 30 percent of infections in the upper respiratory tract of adults

When the animal corona virus can transmit the disease to humans, a new type of corona virus appears. The transmission of germs from animals to humans is called zoonotic transmission

A serious and dangerous disease can occur by changing the host of the corona virus from animal to human. There are several factors involved in this, especially the low human immune system against the new virus. Examples of this type of corona virus are as follows:

SARS-CoV: The virus that first caused SARS in 2003
MERS-CoV: The virus that first caused the Middle East Respiratory Syndrome (MERS) in 2014
SARS-CoV-2: The virus that first caused Covid-19 disease in 2019

?What is SARS

SARS is the name of a respiratory disease caused by the SARS-CoV virus. It stands for Acute Respiratory Syndrome

The global outbreak of SARS lasted from late 2002 to mid-2003. Meanwhile, more than 8,000 people became infected with the virus, and 774 people died

SARS-CoV is believed to have originated in bats. The virus was said to have been transmitted from bats to an intermediate host animal, the feral cat, before being transmitted to humans

Fever is one of the first symptoms of SARS that can be accompanied by other symptoms:

Excessive illness or fatigue
Cramps and body aches
Respiratory symptoms may worsen and lead to shortness of breath. In acute conditions and disease progression, pneumonia or respiratory distress occurs

?What is the difference between Covid-19 and SARS

Covid-19 and SARS have many similarities: For example, both:

Respiratory diseases are caused by the corona virus.
They are said to have first appeared in bats and then transmitted to humans by an intermediate host.
They are spread through the respiratory particles of an infected person while sneezing or coughing or through contact with contaminated objects or surfaces.
The stability time of both is the same in different air and levels.
They lead to acute illness to the point that oxygen and the respiratory system are sometimes needed.
As the disease progresses, the symptoms of both worsen
The risk groups for these two diseases are the same: the elderly and those who already have a chronic illness
No specific treatment or vaccine has been discovered for either disease. The latest news on the Corona vaccine is here
However, the two diseases, as well as the viruses that cause them, are different in several ways. Let’s take a closer look at this

Comparison of Covid-19 and SARS symptoms

In general, the symptoms of Covid-19 and SARS are the same, but there are slight differences.


Common symptoms of fever
Shortness of breath fever
Cramps and body aches
Shortness of breath
Less common symptoms are runny or stuffy nose
Cramps and body aches
Sore throat
Chills diarrhea

Comparison of the intensity of Covid-19 and SARS

It is estimated that 20% of people with Covid-19 need to be hospitalized. A smaller percentage of this group will need a respiratory system

Overall, the incidence of SARS was more severe. It is estimated that 20 to 30 percent of people with SARS need a respiratory tract

Estimates of death rates due to Covid-19 vary greatly depending on factors such as the location and coordinates of a population. Overall, the death toll from Covid-19 is estimated at 0.25 to 3 percent

SARS is more deadly than Covid-19. Its mortality rate is estimated at 10%

Comparison of molecular factors of Covid-19 and SARS

Recent research into the genetic information (genome) of the SARS-CoV-2 virus sample shows that it is closer to the bat corona virus than SARS. The genetic similarity of the new corona virus to SARS is 79%

The SARS-CoV-2 receptor binding site was also compared with other coronaviruses. Remember that the virus must interact with proteins on the cell surface (receptors) to enter the cell. The virus does this through proteins on its surface

Interesting results were obtained by examining the protein sequence of the SARS-CoV-2 receptor binding site. Although SARS-CoV-2 is generally more similar to the bat corona virus, its binding site was more similar to that of SARS-CoV

Comparison of Covid-19 and SARS receiver connection

Research is ongoing into how the new corona virus enters and enters the cell compared to the SARS virus. Note that the following research was performed only on proteins and not on the tissue of a complete virus

Recent research has shown that SARS-CoV-2 and SARS-CoV both use the same host cell receptor. In addition, the viral proteins used to enter the host cell bind to the receptor in both cells with similar adhesion

In another study, we compared the exact region in which a viral protein binds to a host cell receptor. Evidence suggests that the SARS-CoV-2 receptor binding site is more strongly attached to the host cell receptor than the SARS-CoV

If the new coronavirus really binds to the host cell receptor, it will spread more easily than the SARS virus

?Does it take longer for Covid-19 to disappear than SARS

We have not had a global SARS outbreak since 2003. The last case reported was in 2004 in the laboratory. No cases have been reported since

By observing public health, such as the following, we were able to control SARS:

Early detection and quarantine
Quarantine of people who were in contact with the sick person
Social distancing
Is it possible to help eliminate Covid-19 by following these criteria? It must be said that this is more difficult in the case of Covid-19

Some factors can cause Covid-19 disease to last longer, as follows:

About 80% of people with Covid-19 have a mild illness. Some do not even notice the disease. This makes it difficult to distinguish infected people from non-infected ones
People with Covid-19 appear to be carriers earlier than patients with SARS. Because of this, it is difficult to determine who is infected to quarantine a person before transmitting the disease to others
Covid-19 is now rapidly spreading among communities. This was not the case with SARS, which was more prevalent in health centers
Our connection to the world has increased since 2003, which is why Covid-19 is spreading faster across regions and countries
Some viruses, such as the flu and the common cold, have a seasonal pattern. Therefore, the question arises as to whether the Covid-19 disappears as the weather warms. The answer to this question is not yet clear

The causative agent of Covid-19 and SARS is the coronavirus. The virus that causes these diseases may have originated in animals before being transmitted to humans by an intermediate host

There are many similarities between Covid-19 and SARS, but the two are also different. Covid-19 infection can be mild or severe if the cases of SARS were generally severe. But Covid-19 is easier to transfer. In addition, there are differences in the symptoms of these two diseases

Due to the strict implementation of health measures to prevent the spread of SARS, no cases of SARS have been reported since 2004. We may face more challenges in controlling Covid-19 because the virus that causes the disease spreads faster and often has mild symptoms


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