COVID-19 respiratory infections begin in the upper respiratory tract and, in severe situations, can spread to the lower respiratory tract. Respiratory infections are among the most prevalent human illnesses. The virus that causes coronavirus disease 2019 (COVID-19) has a relatively short life cycle. It can live for only up to 24 hours on plastic surfaces such as doorknobs and coffee machines, but it can also survive for several days in empty food containers. The virus spreads through contact with infected bodily fluids, especially saliva and nasal mucus. People who come into close contact with an infected person are at risk of contracting the disease. Symptoms include fever, cough, and difficulty breathing. In some cases, people have shown signs of kidney failure or low blood pressure due to severe stress on the body's immune system. To prevent the spread of COVID-19, experts recommend frequent cleaning of commonly touched surfaces, such as desks, phones, and keyboards. They also recommend washing your hands frequently with an antibacterial soap and getting more sleep, which helps your body build up its natural defenses.