Coronavirus starts from the common cold then turns to some severe respiratory diseases. It is a large part of the zoonotic virus family. Such kind of viruses can easily be transferred from animals to humans. Here is still some other kinds of coronaviruses exist in animals that have not infected humans yet.

COVID-19 has recently discovered in the form of infection in humans. The common symptoms are common seasonal cold mostly dry cough, flu, fever, sneezes, difficulty in breathing and breathe shortness. If it turns to severe, it can cause serious respiratory syndrome, pneumonia, failure of kidneys. Death is also possible in severe cases.

This infection, coronavirus can easily be spread from person to person through the respiratory system. It can simply transfer while coughing and sneezing. Even if one person just has an initial level of infection and it transferred to the person who has a weak immune system, it can be severe for the other person. It can also transfer through touching of different used things. Such as mobile phones, desk, door locks, and other used accessories. According to current research, the major symptoms have exposed on average five days although symptoms appear between two to 14 days.

Another part of the coronavirus family is Middle East Respiratory Syndrome (MERS-CoV) had experienced in human which was transferred from dromedary camels in 2012. Severe Acute Respiratory Syndrome (SARS-CoV) is one more member of the coronavirus family which was found in 2002 as human infection through civet cats.

COVID-19 somehow is similar to past two members of the coronavirus family, Middle East Respiratory Syndrome (MERS-CoV) and Severe Acute Respiratory Syndrome (SARS-CoV). As SARS was spread in 2002, the majority of cases had occurred in Hong Kong and Southern mainland China although it was spread in 17 countries. The fatality rate was 11 percent with around 9 thousand cases. Chances of death mainly depend on age. The rate of fatality is high among the people who are around or over 65years. They have almost 55 percent chances of death. People who are less than 24years have fewer chances of death, almost 1 percent. The cases of Severe Acute Respiratory Syndrome (SARS-CoV) have not recorded after 2004 in the world.

According to the World Health Organization (WHO), the Middle East Respiratory Syndrome (MERS-CoV) was not that severe as Severe Acute Respiratory Syndrome (SARS-CoV). Although it was spread in 21 countries it had a total of 2500 cases were recorded with 860 deaths overall. It was mainly spread in the Arabian Peninsula and spread in other countries through people who traveled from Saudi Arabia and then from person to person. According to different records, it is not discovered how this virus was transferred from dromedary camels to humans.

COVID-19 can be controlled by studying past viruses. For this, we have to adopt safety precautions and avoid social gatherings. Otherwise, it could lead to a high fatality rate around the globe. Although it is spreading on rapid speed and now reached almost 120 plus countries in the world with increasing fatality rate.



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