> It doesn't make a difference if people doing work were vaccinated or not. It turns out to have had little in-practice effect on transmission This is because

> It doesn't make a difference if people doing work were vaccinated or not. It turns out to have had little in-practice effect on transmission This is because of Delta. The original strain was substantially reduced but an order-of-magnitude efficacy jump made that moot. You’re right, however, that we should have focused on masking and air filtration since that was actually effective at preventing spread in close quarters like a school or workplace.