“How easily does the 2019-nCoV spread from person to person, and how deadly is the virus? At the moment, scientists only have informed guesses, which are likely to solidify in the coming weeks and months. But what we know so far is instructive.” Julia Belluz in Vox: The 2 key questions that will determine if the coronavirus outbreak becomes a pandemic.

+ So far, there are 4,610 confirmed cases and 106 deaths. Those numbers are rising steadily in China as other countries begin to report cases. Here’s the latest from CNN.

+ InFocus: Photos From Wuhan Under Quarantine.

+ For more on flu pandemics, Netflix recently released a docuseries called Pandemic, How to Prevent an Outbreak.