The overall case-hospitalization rate among patients was 5.7%.
Study suggests medical masks may offer similar protecion as N95 respirators, but experts say hold on.
Public health professionals use some terms imprecisely, others incorrectly, and still others technically accurate but almost sure to be misunderstood by the public.
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In addition, Vice President Pence appoints AIDS expert Deborah Birx, MD, to coordinate the federal response.
Pence, who will lead a response task force, says he will reach out to governors.
For the first time, new cases outside of China exceed new cases reported within China.
"Not a question of if, but when, and of how many ... will have severe illnesses."
In Europe, Austria, Croatia, and Switzerland reported their first cases, with links to Italy, as Middle East countries reported more cases, fueled by Iran's outbreak.
Even COVID-19 pneumonia patients without symptoms have abnormal lung findings on CT, the study found.
Also, cases continue to surge in South Korea and Italy, and the US reports more positive tests in evacuees from the Diamond Princess cruise ship.
The JAMA study reveals a 49% death rate in critically ill patients; for a much smaller study it was 62%.
Korea confirms 379 new cases and 602 overall, and infections in Italy spike to 132.
In other developments, Italy's outbreak expanded and a California city blocked a plan to move evacuees from Travis Air Force Base.