Fair enough. It's just an example though - there are a lot of other low-wage industries with lots of public contact, and people may try and hide their illness i

Fair enough. It's just an example though - there are a lot of other low-wage industries with lots of public contact, and people may try and hide their illness if they need the work. And of course people may be contagious before exhibiting a lot of symptoms, but that's certainly not US specific.