Clearly, this speaks volumes about the highly infectious nature of this deadly virus. It supports the notion that the infectious dose of virus is very low.
I think the best scenario (most probable) is that the HCWs are getting it from their PPE when they take it off.
Is it possible to execute this maneuver flawlessly? Sure. Is it possible for 100 workers to execute it flawlessly 100 times? Not a chance.
Can’t help but wonder how many health care workers will quit or stay home if (when) this starts to spread. The first few patients will get the best of care. But, at some point, panic will set in, the System will implode, and then lots of people will get no care. Then watch out.