COVID-19 - Wikipedia People with the COVID-19 infection may have different symptoms, and their symptoms may change over time
Coronavirus disease (COVID-19) COVID-19 is caused by the SARS-CoV-2 virus, which spreads through the air in infectious respiratory particles from an infected person Transmission is more likely in close contact or shared indoor spaces The virus can also spread by touching contaminated surfaces and then the eyes, nose or mouth
Coronavirus Disease 2019 (COVID-19) | Covid | CDC Learn about the types of COVID-19 treatments, symptom management, and recovery Information for healthcare workers about COVID-19 Guidance, tools, and resources for health departments to address COVID-19 Get information about the risk factors of COVID-19 for the general public
COVID-19 pandemic - Wikipedia In epidemiology, a pandemic is defined as "an epidemic occurring over a very wide area, crossing international boundaries, and usually affecting a large number of people" During the COVID-19 pandemic, as with other pandemics, the meaning of this term has been challenged [17] The end of a pandemic or other epidemic only rarely involves the total disappearance of a disease, and historically
Coronavirus disease (COVID-19) - World Health Organization (WHO) Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus Most people infected with the virus will experience mild to moderate respiratory illness and recover without requiring special treatment However, some will become seriously ill and require medical attention
日历月历