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Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus.
Snow, the solid form of water that crystallizes in the atmosphere and, falling to the Earth, covers, permanently or temporarily, about 23 percent of the Earth’s surface.
Snow comprises individual ice crystals that grow while suspended in the atmosphere-usually within clouds-and then fall, accumulating on the ground where they undergo further changes.
Common signs of infection include respiratory symptoms, fever, cough, shortness of breath and breathing difficulties. In more severe cases, infection can cause pneumonia, severe acute respiratory syndrome, kidney failure and even death.