| It would be great if people writing articles like this (I hesitate to call them journalists these days) could take the time to provide more context. According to the county dashboard, Alameda County had 2,564 cases on May 20, 2 days after Tesla reopened: https://ac-hcsa.maps.arcgis.com/apps/opsdashboard/index.html... With a population of 1,671,000, that means about 0.15% of Alameda County residents had been diagnosed with covid-19 at that point. So we could reasonably expect 15 cases out of the 10,000 employees at Tesla's factory. Why the breathless article about 2 cases? |
Alameda county has had 2564 cases in total since March (up to May 20th) -- so you'd have expected 15 employees to have tested positive for COVID since March. This is a very different statement than 2 of its employees have tested positive shortly after it re-opened.
Loosely one might compare it to those that tested positive in the week of May 20th, which, according to your link, is about 400-500 new cases (about 5x fewer than the cumulative total). So you might reasonably expect something like ~3 cases if you assume the Tesla workers had the same positive test rate as the general population of the county.