WORLD_ What We Know About the Coronavirus, From Symptoms to Who Is at Risk

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What We Know About the Coronavirus, From Symptoms to Who Is at Risk

Health officials are worried about a growing number of cases outside China


Passengers wearing protective face masks at a train station in Hong Kong. Photo: Kin Cheung/Associated Press



By Betsy McKay
Updated Feb. 26, 2020 9:09 am ET



Concern is high about the dangerous coronavirus behind an epidemic in China and 33 other countries. The number of people newly diagnosed every day with illness caused by the virus is on the decline in the epicenter of Hubei Province, China, though it is still high. International health officials are increasingly worried about growing outbreaks of the virus elsewhere, including among people who neither have been to China nor in contact with anyone who has. U.S. health officials have warned that they expect more transmission of the virus in the country.

Scientists and public-health officials keep learning about the virus, called Severe Acute Respiratory Syndrome Coronavirus 2, or Sars-CoV-2. The disease it causes is called Covid-19.

Among key questions they are seeking answers to are how the virus is transmitted, how easily it spreads and how many people are infected but don’t develop symptoms.

Here is what they know so far.


What is a coronavirus?

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READ MORE: https://www.wsj.com/articles/what-we-know-about-the-wuhan-virus-11579716128?mod=trending_now_2


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