Contact tracing hasn't done squat to slow the spread of COVID19. Masks, hand washing, sanitation, decontamination and yes giving each other some elbow room (social distancing) have all had a positive effect at beating down this illness, but, contact tracing has been nothing more than a smoke screen, waste of money and political football. The talking heads in the major media keep putting spin on anything Dr. Fauci say's. Disney has been (demonstrated at WDW) proactive, the best and most organized plus effective at day to day processes to combat the spread of the disease while still conducting business. There will be no 100% anything with this disease nor will there be any 0 (zero) anything. There is a need to adapt and live.