Don’t Panic: The comprehensive Ars Technica guide to the coronavirus [Updated 4/4]

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Nearly 1.2 million people have been infected with a new coronavirus that has spread widely from its origin in China over the past few months. Nearly 64,000 have already died. Our comprehensive guide for understanding and navigating this global public health threat is below.

This is a rapidly developing epidemic, and we will update this guide periodically to keep you as prepared and informed as possible.

March 8: Initial publication of the document.
Latest Updates 4/4/2020: Updates have been added to the sections on deaths, how transmission compares with flu, and masks. The global and US case counts have also been updated.
A list of all updates and additions to this document can be found at the end.

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