From Wejo:
"But it would be good for states to share their testing results and not just positive tests."
Here is state-level data:
http://covidtracking.com/
It is updated several times a day and includes links to state departments of public health web pages as well as to their respective Twitter feeds.
Of course you all probably already bookmarked the Johns Hopkins COVID-19 tracker:
https://coronavirus.jhu.edu/map.html
Notably, their data is downloadable from Github and frequently updated if you would like to do additional analysis.
This article linked here is an example of taking that data and comparing the growth curve to other nations (note, I'm not a big Mother Jones fan, but Kevin's analysis is informative nonetheless):
https://www.motherjones.com/kevin-drum/2020/03/update-the-united-states-is-not-a-coronavirus-outlier/
I'm sure there are many quant-oriented readers of Letsrun that could take this data and make some interesting analysis and information.
If any readers have questions, CDC has good resource on how to clean at home and what products are recommended.
https://www.cdc.gov/coronavirus/2019-ncov/prepare/cleaning-disinfection.html
We know the corona virus can stick around for a little while on surfaces, but the picture is still not complete:
https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v1.full.pdf
This article received quite a bit of media coverage. Note it's pre-print, so yet to undergo peer review (not that "peer-review" is necessarily a hallmark of excellence).
If you are a Twitter user, this is a decent list of credible env sci and health professionals you may consider following:
https://twitter.com/i/lists/1233998285779632128