Science

Mapping the coronavirus outbreak: Where in the world — and the US — the disease has spread

china wuhan virus
Medical staff carry a box by the Jinyintan hospital in Wuhan, which houses patients with the coronavirus, on January 10, 2020. Reuters
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The new coronavirus has killed more than 3,000 people. Over 95,000 cases have been confirmed as of Wednesday. More than 90% of those are in China, though the outbreak has spread to 81 other countries. 

The virus emerged at the end of December in the city of Wuhan, which is home to 11 million people. The US reported its first death from the virus on Saturday — a man in his 50s in Washington state. Nine other deaths were reported in Washington state, and one death was reported in California.

More than 150 cases have been confirmed in the US, including 46 people who were quarantined on the Diamond Princess cruise ship in Japan then flown back to the US. Another three confirmed cases are evacuees from Wuhan who were quarantined upon arrival in the US.

The US has also reported several likely cases of "community spread" — patients who had no known exposure to the virus and no travel history in China. These include two cases in California, four in Washington state, and one in Washington County, Oregon.

On February 25, officials at the Centers for Disease Control and Prevention (CDC) said Americans should "prepare for the expectation that this might be bad." 

The CDC is asking any citizens returning from five countries — China, South Korea, Italy, Japan, or Iran — who develop a fever, cough, or shortness of breath to seek medical help and self-isolate. US citizens have been advised to avoid all nonessential travel to China, South Korea, Italy, and Iran. Foreign nationals who've been in China within the prior 14 days are currently not allowed to enter the US. 

This map shows the current travel warnings:

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Sinéad Baker
Sinéad Baker is a Military and Defense Correspondent based in Business Insider's London bureau, writing about Russia's invasion of Ukraine and NATO actions.Sinéad most often covers soldiers' experiences, military strategy, battlefield developments, weapons systems, the defense industry's response, and the impact on NATO and European security, and geopolitical decisions that surround the Ukraine war. She has reported from NATO’s frontlines and around Europe,  has interviewed multiple prime ministers and defense ministers, has appeared on BBC News and The Guardian's politics podcast, and has been cited by Congressional hearings.Sinéad has also extensively covered US politics and previously led Business Insider's breaking news coverage from London.Sinéad previously completed a master's degree in investigative journalism at City, University of London, and has written for The Guardian, The Observer, and TheJournal.ie. Sinéad is the former editor of the multi-award-winning The University Times in Dublin.Expertise
  • Experiences of soldiers in Ukraine, including battlefield developments and tactics
  • Western military responses to the war, and lessons they should learn
  • New weaponry built for and in response to the war 
Email Sinéad at sbaker@bjinnox.com or find her on X.
Aria Bendix was formerly a senior reporter at Insider, covering science and health. She wrote predominantly about the COVID-19 pandemic. In March 2020, she broke the news that the CDC had unnecessarily delayed coronavirus testing for more than two weeks by failing to communicate with state labs. Then in May 2020, she broke the news that some COVID-19 patients were developing long-lasting symptoms (now known as long COVID). In addition to COVID-19, Aria reported on environmental toxins and diseases such as autism and Alzheimer's. Her feature stories revealed harmful levels of lead in drinking water in Newark, New Jersey, and cancer and chronic coughs among residents of a former nuclear training site in San Francisco. She often appeared on radio shows, podcasts, and television to discuss her work. Aria was previously an Assistant Editor at The Atlantic and an in-house journalist at New York University. She holds a bachelor's degree from Harvard and a Master of Fine Arts from The New School.
Lauren Frias was a Visual Features editor at Business Insider, reporting on national and global news through a visual lens.Her coverage spanned a variety of leading news cycles, from culture and entertainment to politics and defense, producing photo-driven stories with compelling visuals and immersive narratives.She has written for publications across the globe, including The Boston Globe, The Daily Telegraph Australia, and several local newspapers in Boston and her hometown of Chicago, IL.You can contact and follow Lauren on LinkedIn or @laurenfrias_ on X and Bluesky.