Corona virus disease 2019 (Covid-19) is an infectious disease caused by the Corona virus 2019, whose scientific name is abbreviated SARS-CoV-2. The disease was first identified in 2019 in Wuhan, the capital of Hubei Province in central China, and has since spread worldwide, causing the Covid-19 epidemic. Vaccines are still being developed to protect against SARS-CoV-20.
Corona virus spreads in the first instance between people in a similar way to influenza, through respiratory droplets from coughing or sneezing. The period between exposure and the appearance of symptoms is about five days, but it can take from two to 14 days. The virus is transmitted by air. The risks of transmission of COVID-19 through the faeces of an infected person are limited. The organs most affected by Covid-19 are the lungs and the digestive system, because after infection, the virus is caught in the cells by the enzyme ACE2 (ACE2), and this is present in many cells of the second type of air sacs in the lungs. The virus uses a glycoprotein on the surface of cells. The virus also affects the organs of the digestive system because ACE2 is present in many cells of the lining of the stomach, diffuse and rectum. The virus is received in the feces of 17% of the eyes from one day to 12 days after the virus is no longer present in samples from the respiratory system. The infected person infected at least two or three others, according to estimates in September 2020.
The Covid-19 epidemic spread in the world from December 2019 and is considered a global epidemic, and there are fears that it will kill 100 million people. The epidemic began in mid-December 2019 in Wuhan, Hubei Province, central China. Most of the first cases were related to the Huanan Seafood Wholesale Market. From Wuhan, the SARS 2 virus spread in China, and then it reached Bangkok, Tokyo, Seoul, Beijing, Shanghai, Guangdong, Hong Kong, Macau, Everett, Vietnam, and Singapore. The first spread of the virus outside China was in Vietnam, from a father to his son. The first confirmed death from infection with the virus occurred on January 9, 2020.
According to data from the China Center for Disease Control, mortality rates are between 0.2 and 0.4% between the ages of ten and fifty years. The percentages rise after this age. The odds of dying due to Covid-19 are about 1.3% among people in their fifties, 3.6% of people in their sixties, and 8% in their seventies, and about 14.8% among people over eighty years of age. Chances of death increase with increasing age. This is because many elderly people have other diseases such as cancer, high blood pressure or diabetes. According to statistics until March 20, 2020, the death rate for each number of diagnosed cases was 4.1%; And you will