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Washington State DOH have been reporting confirmed cases since early February – and analysis shows this is exponential.

Update: 18 March – data up to 17 March shows that the rate of increase is slowing. This could be a net positive; or just a limiting factor of tests and testing capacity. Time will tell.


Data from WA DOH – collected daily.

Log trendline shows some 10,000 positive by around 22 March, 100,000 by 29 March. Staggering numbers – and likely to be depressed (i.e. delayed) by the lack of testing kits and testing capacity. UW Virology as an example has been running flat out and maximum capacity testing local and national samples.

Global and regional trends are available at the ever excellent JHU dashboard and this from Mark Handley at UCL.