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Other countries, including the United States, confirmed cases.
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The White House announces a coronavirus task force.
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The W.H.O. declared a global health emergency.
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The Trump administration restricted travel from China.
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The disease the virus causes was named.
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At a coronavirus task force briefing, Trump declares a national emergency.
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The C.D.C. recommended no gatherings of 50 or more people in the U.S.
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Governor Mike DeWine announces school closures.
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The United States led the world in confirmed cases.
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Coronavirus deaths in the U.S. passed 100,000.
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The U.S. saw July cases more than double the total of any other month.
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Universities that reopened soon began moving classes online.
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Classes resume at St. Ignatius
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President Trump tested positive for the virus.
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The U.S. death toll hit 250,000.
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Biden said he will ask Americans to wear masks for 100 days.
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The F.D.A. approved a vaccine by Pfizer.
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The first Covid-19 vaccination in the United States
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The F.D.A. approved Moderna’s Covid vaccine.
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Chinese authorities treated dozens of cases of pneumonia of unknown cause.
