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Feb 22, 2021 · COVID-19 seems to spread more easily than flu and causes more serious illnesses in some people. It can also take longer before people show symptoms and people can be contagious for longer. More information about differences between flu and COVID-19 is available in the different sections below.

COVID-19 is more infectious than influenza, but less so than measles. It often spreads in clusters, where infections can be traced back to an index case or geographical location. There is a major role of "super-spreading events", where many people are infected by one person.

Keep in mind some people may have COVID-19 and spread it to others, even if they don't have symptoms or don't know they have COVID-19. Avoid crowds and indoor places that have poor ventilation. Wash your hands often with soap and water for at least 20 seconds, or use an alcohol-based hand sanitizer that contains at least 60% alcohol.

Johns Hopkins experts in global public health, infectious disease, and emergency preparedness have been at the forefront of the international response to COVID-19. This website is a resource to help advance the understanding of the virus, inform the public, and brief policymakers in order to guide a response, improve care, and save lives.

Apr 16, 2021 · The coronavirus COVID-19 is affecting 219 countries and territories. The day is reset after midnight GMT+0. The list of countries and their regional classification is based on the United Nations Geoscheme. Sources are provided under "Latest News." Learn more about Worldometer's COVID-19 data