types of viruses that cause disease in humans and animals, as it infects the human respiratory system in particular. Corona virus is an infectious virus, which can be transmitted from animal to human or from human to human, as the virus is transmitted from the infected person to other people through air filled with sneezing and coughing, and direct contact from the infected person by touching it or peace with the hand, and touching contaminated surfaces With illness then touch the body parts such as the eye, nose and mouth. If you are looking for a new Corona virus in China, read the following article: [[ What is the new Corona virus 2019-20 ]] In the event of corona disease spread, preventive measures should be taken, such as washing hands permanently with water and soap, and avoiding touching the nose, eye and mouth with the contaminated hand, and staying away from people with the disease, especially because no vaccine has been discovered to prevent infection so far. Corona virus symptoms Corona virus causes damage to the respiratory system, causing some of the following symptoms: Runny nose. Coughing. Sore throat. High body temperature. Pneumonia if the infection affects the lower part of the respiratory system. The stages of corona virus development Scientists discovered two types of Corona virus at the beginning of the second millennium: (HCoV-229E and HCoV-OC43). In 2003, a third type of virus, called SARS, appeared in Hong Kong, China, and affected a large number of people, as the number of people infected with the disease reached 8,422 cases, and 916 people died worldwide. In 2004 a new type of virus appeared called NL63. In 2005 a new group of the virus emerged named HKU1. In 2012, the first patient died due to exposure to a new type of corona virus, which differs from all previously known varieties, and was called the new corona virus. The World Health Organization issued a global warning announcing the emergence of a new type of corona virus in Saudi Arabia and Qatar, similar to its characteristics The SARS virus is almost, and the two viruses differ with the prevalence among people, as the new Corona virus has spread less than the SARS virus, but the number of deaths from the new Corona virus has increased to 50%, especially among the elderly and people with chronic diseases. Scientists have called the new type of corona virus (the Corona virus, which causes Middle Eastern respiratory syndrome). In 2019, in December, the Wuhan virus, known as the new corona virus 2019,
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