Coronavirus? Biological warfare?

Timing:

>Takes two weeks to incubate

>Hits when the biggest migration of people on the planet happens. Chinese New Year

Location:

>Wuhan, a logistics hub.

>Most railway lines and airport destinations from China go through Wuhan.

>Densely populated city.

>Plausible deniability.

Potential to cause a mass extinction?

C_A? NK?